Stephen E. Harris

All Publications

• Electromagnetically induced transparency and quantum heat engines PHYSICAL REVIEW A Harris, S. E. 2016; 94 (5)

  View details for DOI 10.1103/PhysRevA.94.053859

  View details for Web of Science ID 000388814700013

• X-ray second harmonic generation. Physical review letters Shwartz, S., Fuchs, M., Hastings, J. B., Inubushi, Y., Ishikawa, T., Katayama, T., Reis, D. A., Sato, T., Tono, K., Yabashi, M., Yudovich, S., Harris, S. E. 2014; 112 (16): 163901-?

  Abstract

  We report clear experimental evidence for second harmonic generation at hard x-ray wavelengths. Using a 1.7 Å pumping beam generated by a free electron laser, we observe second harmonic generation in diamond. The generated second harmonic is of order 10 times the background radiation, scales quadratically with pump pulse energy, and is generated over a narrow phase-matching condition. Of importance for future experiments, our results indicate that it is possible to observe nonlinear x-ray processes in crystals at pump intensities exceeding 1016  W/cm2.

  View details for PubMedID 24815649

• X-Ray Second Harmonic Generation PHYSICAL REVIEW LETTERS Shwartz, S., Fuchs, M., Hastings, J. B., Inubushi, Y., Ishikawa, T., Katayama, T., Reis, D. A., Sato, T., Tono, K., Yabashi, M., Yudovich, S., Harris, S. E. 2014; 112 (16)

  View details for DOI 10.1103/PhysRevLett.112.163901

  View details for Web of Science ID 000338513000007

• X-ray and optical wave mixing NATURE Glover, T. E., Fritz, D. M., Cammarata, M., Allison, T. K., Coh, S., Feldkamp, J. M., Lemke, H., Zhu, D., Feng, Y., Coffee, R. N., Fuchs, M., Ghimire, S., Chen, J., Shwartz, S., Reis, D. A., Harris, S. E., Hastings, J. B. 2012; 488 (7413): 603-?

  Abstract

  Light-matter interactions are ubiquitous, and underpin a wide range of basic research fields and applied technologies. Although optical interactions have been intensively studied, their microscopic details are often poorly understood and have so far not been directly measurable. X-ray and optical wave mixing was proposed nearly half a century ago as an atomic-scale probe of optical interactions but has not yet been observed owing to a lack of sufficiently intense X-ray sources. Here we use an X-ray laser to demonstrate X-ray and optical sum-frequency generation. The underlying nonlinearity is a reciprocal-space probe of the optically induced charges and associated microscopic fields that arise in an illuminated material. To within the experimental errors, the measured efficiency is consistent with first-principles calculations of microscopic optical polarization in diamond. The ability to probe optical interactions on the atomic scale offers new opportunities in both basic and applied areas of science.

  View details for DOI 10.1038/nature11340

  View details for Web of Science ID 000308095100046

  View details for PubMedID 22932384

• A miniature ultrabright source of temporally long, narrowband biphotons APPLIED PHYSICS LETTERS Chuu, C., Yin, G. Y., Harris, S. E. 2012; 101 (5)

  View details for DOI 10.1063/1.4740270

  View details for Web of Science ID 000307676600008

• X-Ray Parametric Down-Conversion in the Langevin Regime PHYSICAL REVIEW LETTERS Shwartz, S., Coffee, R. N., Feldkamp, J. M., Feng, Y., Hastings, J. B., Yin, G. Y., Harris, S. E. 2012; 109 (1)

  Abstract

  We experimentally and theoretically study the coincidence count rate for down-converted x-ray photons. Because of photoionization, parametric down-conversion at x-ray wavelengths generally involves loss and the theoretical description requires a Langevin approach. By working in a transmission geometry (Laue) rather than in the Bragg geometry of previous experiments, we obtain an improvement in the signal-to-noise ratio of 12.5, and find agreement between experiment and theory.

  View details for DOI 10.1103/PhysRevLett.109.013602

  View details for Web of Science ID 000306323900005

  View details for PubMedID 23031104

• Anthony E. Siegman: Laser pioneer, Optical Society president, friend, and colleague PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA Harris, S. E. 2012; 109 (5): 1379-1379

  View details for DOI 10.1073/pnas.1120221109

  View details for Web of Science ID 000299731400017

  View details for PubMedID 22307588

  View details for PubMedCentralID PMC3277163

• Ultrabright backward-wave biphoton source PHYSICAL REVIEW A Chuu, C., Harris, S. E. 2011; 83 (6)

  View details for DOI 10.1103/PhysRevA.83.061803

  View details for Web of Science ID 000291796700003

• Polarization Entangled Photons at X-Ray Energies PHYSICAL REVIEW LETTERS Shwartz, S., Harris, S. E. 2011; 106 (8)

  Abstract

  We show that polarization entangled photons at x-ray energies can be generated via spontaneous parametric down-conversion. Each of the four Bell states can be generated by choosing the angle of incidence and polarization of the pumping beam.

  View details for DOI 10.1103/PhysRevLett.106.080501

  View details for Web of Science ID 000287587900003

  View details for PubMedID 21405557

• Generation and Compression of Chirped Biphotons PHYSICAL REVIEW LETTERS Sensarn, S., Yin, G. Y., Harris, S. E. 2010; 104 (25)

  Abstract

  We describe an experiment demonstrating the radarlike technique of "chirp and compress." Chirped biphotons are generated using a quasi-phase-matched nonlinear crystal where the phase-matched frequency varies linearly with position. Sum frequency generation is used to measure the amplitude of the biphoton wave function. As compared to a nonchirped crystal, compression and an increase in summing efficiency of a factor of 5 is observed.

  View details for DOI 10.1103/PhysRevLett.104.253602

  View details for Web of Science ID 000279081900002

  View details for PubMedID 20867376

• Hiding Single Photons with Spread Spectrum Technology PHYSICAL REVIEW LETTERS Belthangady, C., Chuu, C., Yu, I. A., Yin, G. Y., Kahn, J. M., Harris, S. E. 2010; 104 (22)

  Abstract

  We describe a proof-of-principal experiment demonstrating the use of spread spectrum technology at the single photon level. We show how single photons with a prescribed temporal shape, in the presence of interfering noise, may be hidden and recovered.

  View details for DOI 10.1103/PhysRevLett.104.223601

  View details for Web of Science ID 000278207500009

  View details for PubMedID 20867167

• Observation of Nonlocal Modulation with Entangled Photons PHYSICAL REVIEW LETTERS Sensarn, S., Yin, G. Y., Harris, S. E. 2009; 103 (16)

  Abstract

  We demonstrate a new type of quantum mechanical correlation where phase modulators at distant locations, acting on the photons of an entangled pair, interfere to determine the apparent depth of modulation. When the modulators have the same phase, the modulation depth doubles; when oppositely phased, the modulators negate each other.

  View details for DOI 10.1103/PhysRevLett.103.163601

  View details for Web of Science ID 000270899500022

  View details for PubMedID 19905694

• Modulation and measurement of time-energy entangled photons PHYSICAL REVIEW A Belthangady, C., Du, S., Chuu, C., Yin, G. Y., Harris, S. E. 2009; 80 (3)

  View details for DOI 10.1103/PhysRevA.80.031803

  View details for Web of Science ID 000270383900019

• Resonant Sum Frequency Generation with Time-Energy Entangled Photons PHYSICAL REVIEW LETTERS Sensarn, S., Ali-Khan, I., Yin, G. Y., Harris, S. E. 2009; 102 (5)

  Abstract

  We describe a technique for enhancing the efficiency of sum frequency generation using entangled signal and idler photons. By resonating the sum frequency field, we observe that the generated power varies linearly with input power and is increased by a factor of 12.

  View details for DOI 10.1103/PhysRevLett.102.053602

  View details for Web of Science ID 000263166400025

  View details for PubMedID 19257512

• Observation of optical precursors at the biphoton level OPTICS LETTERS Du, S., Belthangady, C., Kolchin, P., Yin, G. Y., Harris, S. E. 2008; 33 (18): 2149-2151

  Abstract

  We describe the observation of a sharp leading-edge spike in a biphoton wave packet that is produced using slow light and measured by two-photon correlation. Using the stationary-phase approximation we characterize this spike as a Sommerfeld-Brillouin precursor resulting from the interference of low- and high-frequency spectral components.

  View details for Web of Science ID 000259891400044

  View details for PubMedID 18794960

• Electro-optic modulation of single photons PHYSICAL REVIEW LETTERS Kolchin, P., Belthangady, C., Du, S., Yin, G. Y., Harris, S. E. 2008; 101 (10)

  Abstract

  We use the Stokes photon of a biphoton pair to set the time origin for electro-optic modulation of the wave function of the anti-Stokes photon thereby allowing arbitrary phase and amplitude modulation. We demonstrate conditional single-photon wave functions composed of several pulses, or instead, having Gaussian or exponential shapes.

  View details for DOI 10.1103/PhysRevLett.101.103601

  View details for Web of Science ID 000258975100020

  View details for PubMedID 18851214

• Nonlocal modulation of entangled photons PHYSICAL REVIEW A Harris, S. E. 2008; 78 (2)

  View details for DOI 10.1103/PhysRevA.78.021807

  View details for Web of Science ID 000259263400023

• Subnatural linewidth biphotons with controllable temporal length PHYSICAL REVIEW LETTERS Du, S., Kolchin, P., Belthangady, C., Yin, G. Y., Harris, S. E. 2008; 100 (18)

  Abstract

  This Letter describes the generation of biphotons with a temporal length that can be varied over the range of 50-900 ns, with an estimated subnatural linewidth as small as 0.75 MHz. We make use of electromagnetically induced transparency and slow light in a two-dimensional magneto-optical trap with an optical depth as high as 62. We report a sharp leading edge spike that is a Sommerfeld-Brillouin precursor, as observed at the biphoton level.

  View details for DOI 10.1103/PhysRevLett.100.183603

  View details for Web of Science ID 000255771400022

  View details for PubMedID 18518372

• Generation of Biphotons with Controllable Temporal Length 2008 CONFERENCE ON LASERS AND ELECTRO-OPTICS & QUANTUM ELECTRONICS AND LASER SCIENCE CONFERENCE, VOLS 1-9 Belthangady, C., Du, S., Kolchin, P., Yin, G. Y., Harris, S. E. 2008: 3277-3278

  View details for Web of Science ID 000260498401632

• Chirp and compress: Toward single-cycle biphotons PHYSICAL REVIEW LETTERS Harris, S. E. 2007; 98 (6)

  Abstract

  The Letter describes a technique for the spontaneous generation of chirped time-energy entangled photons. Transmitting either photon through an appropriate dispersive medium results in a temporally compressed, transform limited biphoton. At maximum bandwidth, the biphoton is a single cycle in length, with a waveform that has the same characteristic shape as a classical single-cycle pulse.

  View details for DOI 10.1103/PhysRevLett.98.063602

  View details for Web of Science ID 000244117400023

  View details for PubMedID 17358939

• Molecular modulation in a hollow fiber OPTICS LETTERS Sensarn, S., Goda, S. N., Yin, G. Y., Harris, S. E. 2006; 31 (19): 2836-2838

  Abstract

  We report the extension of the technique of molecular modulation to a deuterium-filled optical fiber. Using driving lasers at 807 and 1064 nm, each with a pulse energy of several millijoules and a 200 microm diameter fiber with a length of 22.5 cm, we generate 12 sidebands with wavelengths spanning 1.56 microm to 254 nm.

  View details for Web of Science ID 000240869400006

  View details for PubMedID 16969394

• Generation of narrow-bandwidth paired photons: Use of a single driving laser PHYSICAL REVIEW LETTERS Kolchin, P., Du, S., Belthangady, C., Yin, G. Y., Harris, S. E. 2006; 97 (11)

  Abstract

  We describe a generator of narrow-band paired photons. A single retroreflected Ti:sapphire laser is used to cool, render transparent, and parametrically pump a cloud of (87)Rb atoms. We attain a paired-photon generation rate into opposing fibers of 600 counts/s with an intensity correlation function that has a width of 5 ns, and violates the Cauchy-Schwartz criteria by a factor of 2000.

  View details for DOI 10.1103/PhysRevLett.97.113602

  View details for Web of Science ID 000240545600021

  View details for PubMedID 17025883

• Coherent control of laser-induced breakdown OPTICS LETTERS Shverdin, M. Y., Goda, S. N., Yin, G. Y., Harris, S. E. 2006; 31 (9): 1331-1333

  Abstract

  We demonstrate coherent control of laser-induced optical breakdown in Ar and Xe with a femtosecond time-scale pulse train. By using a genetic algorithm to set the relative phases of seven optical sidebands that span two octaves of bandwidth, we enhance or suppress the probability of breakdown, vary the onset time of the spark, and to some extent, vary the position of the spark and the timing of the laser-produced shock wave.

  View details for Web of Science ID 000237095600053

  View details for PubMedID 16642102

• Measurement of Fourier-synthesized optical waveforms OPTICS LETTERS Goda, S. N., Shverdin, M. Y., Walker, D. R., Harris, S. E. 2005; 30 (10): 1222-1224

  Abstract

  Following the experiments of Shverdin and colleagues [Phys. Rev. Lett. 94, 033904 (2005)], we describe a technique for determining the temporal envelope of an optical beam whose spectrum consists of n discrete, equally spaced frequency components. Four-wave mixing is employed to generate n-1 higher-frequency sidebands. The relative intensities of these sidebands, together with the intensities of the incident side-bands, determine the unknown relative phases of the incident beam.

  View details for Web of Science ID 000229011800046

  View details for PubMedID 15943316

• Generation of paired photons with controllable waveforms PHYSICAL REVIEW LETTERS Balic, V., Braje, D. A., Kolchin, P., Yin, G. Y., Harris, S. E. 2005; 94 (18)

  Abstract

  We describe experiments and theory showing the generation of counterpropagating paired photons with coherence times of about 50 ns and waveforms that are controllable at a rudimentary level. Using cw lasers, electromagnetically induced transparency and cold 87Rb atoms we generate paired photons into opposing single-mode optical fibers at a rate of approximately 12 000 pairs per second.

  View details for DOI 10.1103/PhysRevLett.94.183601

  View details for Web of Science ID 000229074300022

  View details for PubMedID 15904367

• Breaking the single-cycle barrier PHOTONICS SPECTRA Shverdin, M. Y., Walker, D. R., Goda, S. N., Yin, G. Y., Harris, S. E., Yavuz, D. D. 2005; 39 (2): 92-?

  View details for Web of Science ID 000227158000016

• Generation of a single-cycle optical pulse PHYSICAL REVIEW LETTERS Shverdin, M. Y., Walker, D. R., Yavuz, D. D., Yin, G. Y., Harris, S. E. 2005; 94 (3)

  Abstract

  We make use of coherent control of four-wave mixing to the ultraviolet as a diagnostic and describe the generation of a periodic optical waveform where the spectrum is sufficiently broad that the envelope is approximately a single-cycle in length, and where the temporal shape of this envelope may be synthesized by varying the coefficients of a Fourier series. Specifically, using seven sidebands, we report the generation of a train of single-cycle optical pulses with a pulse width of 1.6 fs, a pulse separation of 11 fs, and a peak power of 1 MW.

  View details for DOI 10.1103/PhysRevLett.94.033904

  View details for Web of Science ID 000226604700029

  View details for PubMedID 15698269

• Generation and control of femtosecond pulses by molecular modulation ITAMP/FOCUS Workshop on Attoscience Sokolov, A. V., Shverdin, M. Y., Walker, D. R., Yavuz, D. D., Burzo, A. M., Yin, G. Y., Harris, S. E. TAYLOR & FRANCIS LTD. 2005: 285–304

  View details for DOI 10.1080/09500340410001731020

  View details for Web of Science ID 000226520300010

• Single-cycle optical pulse generation ULTRAFAST PHENOMENA XIV Walker, D. R., Shverdin, M., YAVUZ, D., Yin, G. Y., Harris, S. E. 2005; 79: 3-7

  View details for Web of Science ID 000228159300001

• Frequency mixing using electromagnetically induced transparency in cold atoms PHYSICAL REVIEW LETTERS Braje, D. A., Balic, V., Goda, S., Yin, G. Y., Harris, S. E. 2004; 93 (18)

  Abstract

  We report the first experimental demonstration of four-wave mixing using electromagnetically induced transparency in cold atoms. Backward-wave, phase-matched difference-frequency conversion is achieved at optical powers of a few nanowatts and at energies of less than a picojoule.

  View details for DOI 10.1103/PhysRevLett.93.183601

  View details for Web of Science ID 000224799500030

  View details for PubMedID 15525163

• Quasiperiodic Raman technique for ultrashort pulse generation PHYSICAL REVIEW LETTERS Yavuz, D. D., Walker, D. R., Shverdin, M. Y., Yin, G. Y., Harris, S. E. 2003; 91 (23)

  Abstract

  We report the experimental demonstration of a new Raman technique that produces 200 sidebands, ranging in wavelength from 3 microm to 195 nm. By studying multiphoton ionization of nitric oxide (NO) molecules, we show mutual phase coherence among 15 visible sidebands covering 0.63 octaves of bandwidth.

  View details for DOI 10.1103/PhysRevLett.91.233602

  View details for Web of Science ID 000187004500022

  View details for PubMedID 14683184

• Low-light-level nonlinear optics with slow light PHYSICAL REVIEW A Braje, D. A., Balic, V., Yin, G. Y., Harris, S. E. 2003; 68 (4)

  View details for DOI 10.1103/PhysRevA.68.041801

  View details for Web of Science ID 000187004700005

• Ultrashort pulse generation by molecular modulation JOURNAL OF OPTICS B-QUANTUM AND SEMICLASSICAL OPTICS Sokolov, A. V., Harris, S. E. 2003; 5 (1): R1-R26

  View details for Web of Science ID 000181809100001

• Raman self-focusing at maximum coherence OPTICS LETTERS Walker, D. R., Yavuz, D. D., Shverdin, M. Y., Yin, G. Y., Sokolov, A. V., Harris, S. E. 2002; 27 (23): 2094-2096

  Abstract

  We demonstrate a type of Raman self-focusing and -defocusing that is inherent in operation at maximum coherence. In this regime the two-photon detuning from the Raman resonance controls the refractive index of the medium.

  View details for Web of Science ID 000179565500012

  View details for PubMedID 18033452

• Control of Feshbach resonances by quantum interference PHYSICAL REVIEW A Harris, S. E. 2002; 66 (1)

  View details for DOI 10.1103/PhysRevA.66.010701

  View details for Web of Science ID 000177200800005

• Rotational Raman generation with near-unity conversion efficiency OPTICS LETTERS Yavuz, D. D., Walker, D. R., Yin, G. Y., Harris, S. E. 2002; 27 (9): 769-771

  Abstract

  We demonstrate collinear generation of equidistant rotational sidebands in low-pressure molecular hydrogen with near-unity conversion efficiency. The spectrum consists of 37 coherent sidebands covering over 20, 000 cm(-1) of spectral bandwidth and ranging from 1.37mum to 352 nm in wavelength.

  View details for Web of Science ID 000175284000032

  View details for PubMedID 18007927

• Raman technique for single-cycle pulses PHYSICAL REVIEW A Harris, S. E., Walker, D. R., Yavuz, D. D. 2002; 65 (2)

  View details for DOI 10.1103/PhysRevA.65.021801

  View details for Web of Science ID 000173879500017

• Femtosecond light source for phase-controlled multiphoton ionization PHYSICAL REVIEW LETTERS Sokolov, A. V., Walker, D. R., Yavuz, D. D., Yin, G. Y., Harris, S. E. 2001; 87 (3)

  Abstract

  We describe a femtosecond Raman light source with more than an octave of optical bandwidth. We use this source to demonstrate phase control of multiphoton ionization under conditions where ionization requires eleven photons of the lowest frequency of the spectrum or five photons of the highest frequency. The nonlinearity of the photoionization process allows us to characterize the light source. Experiment-to-theory comparison implies generation of a near single-cycle waveform.

  View details for DOI 10.1103/PhysRevLett.87.033402

  View details for Web of Science ID 000169989600015

  View details for PubMedID 11461556

• Optical frequency conversion by a rotating molecular wave plate OPTICS LETTERS Sokolov, A. V., Sharpe, S. J., Shverdin, M., Walker, D. R., Yavuz, D. D., Yin, G. Y., Harris, S. E. 2001; 26 (10): 728-730

  Abstract

  We demonstrate efficient four-wave mixing in low-pressure molecular deuterium without the need for phase matching. We use two laser fields with opposite circular polarizations to produce a strong excitation of a rovibrational transition at a frequency of 3167 cm(-1) . The coherent molecular motion, in turn, modulates a third laser field (also circularly polarized) and results in highly efficient single-sideband conversion.

  View details for Web of Science ID 000168622300023

  View details for PubMedID 18040434

• Light modulation at molecular frequencies PHYSICAL REVIEW A Sokolov, A. V., Yavuz, D. D., Walker, D. R., Yin, G. Y., Harris, S. E. 2001; 63 (5)

  View details for Web of Science ID 000168589100013

• Rapid in vivo functional analysis of transgenes in mice using whole body imaging of luciferase expression TRANSGENIC RESEARCH Zhang, W. S., Feng, J. Q., Harris, S. E., Contag, P. R., Stevenson, D. K., Contag, C. H. 2001; 10 (5): 423-434

  Abstract

  The use of transgenic animals in biomedical research is increasing rapidly and may be the best means of determining gene function. Generating transgenic animals typically requires time-consuming screening processes, and gene function is assessed by an array of difficult phenotypic and biochemical assays performed ex vivo. To address the unmet need in transgenic research for functional assays performed with ease in living animals, we demonstrate here that in vivo detection of luciferase enzyme as a transcriptional reporter facilitates rapid screening for both the presence and function of transgenes in intact living mice. Using this approach we identified three bioluminescent transgenic founders where the transgene consisted of the heme oxygenase promoter fused to the modified coding sequence of the luciferase gene. These founders were identified from 183 pups and confirmed by PCR analysis. Identification of HO-1-luc homozygotes from back- crossed F2 littermates was then accelerated by in vivo imaging. In another transgenic mouse line, where the transgene was comprised of the bone morphogenic-4 (BMP4) promoter fused to the modified luciferase gene, we were able to identify transgenic animals and in each line we were able to visualize patterns of expression in living animals over time. The light production from these transgenic mice indicated that the desired DNA fragment was functional and different expression profiles apparent at different ages and after gene induction.

  View details for PubMedID 11708652

• Collinear light scattering using electromagnetically induced transparency XVIIth International Conference on Atomic Physics Harris, S. E., Sokolov, A. V., Walker, D. R., Yavuz, D. D., Yin, G. Y. AMER INST PHYSICS. 2001: 189–203

  View details for Web of Science ID 000167777800014

• Femtosecond light source for phase-controlled atomic processes 14th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society Harris, S. E., Sokolov, A. V., Walker, D. R., Yavuz, D. D., Yin, G. Y. IEEE. 2001: 669–670

  View details for Web of Science ID 000175700800333

• Pondermotive forces with slow light. Physical review letters Harris, S. E. 2000; 85 (19): 4032-5

  Abstract

  This work describes atomic processes which result from the greatly enhanced longitudinal gradient force which is inherent to the propagation of slow light. These processes are (1) ballistic atom motion and atom surfing, and (2) a type of local pondermotive nonlinearity or scattering which results from free-particle sinusoidal motion and the density variation caused by this motion.

  View details for PubMedID 11056617

• Raman generation by phased and antiphased molecular states PHYSICAL REVIEW LETTERS Sokolov, A. V., Walker, D. R., Yavuz, D. D., Yin, G. Y., Harris, S. E. 2000; 85 (3): 562-565

  Abstract

  We use molecular deuterium and two driving lasers to demonstrate collinear generation of mutually coherent equidistant sidebands, covering 50 000 cm(-1) of spectral bandwidth and ranging from 2.94 microm to 195 nm in wavelength. The essential idea is the adiabatic preparation of a single, highly coherent (|rho(ab)| = 0.33) molecular eigenstate.

  View details for Web of Science ID 000088179900021

  View details for PubMedID 10991340

• Efficient nonlinear frequency conversion in an all-resonant double- lambda system Physical review letters Merriam, A. J., Sharpe, S. J., Shverdin, M., Manuszak, D., Yin, G. Y., Harris, S. E. 2000; 84 (23): 5308-11

  Abstract

  We demonstrate efficient, pulsed, gas-phase, nonlinear frequency conversion in a quadruply resonant, double- Lambda system and, simultaneously, verify theoretical predictions of Rabi-frequency matching unique to absorbing nonlinear media. This system is used to up-convert ultraviolet light at 233 nm to the vacuum ultraviolet at 186 nm in atomic Pb vapor with small-signal conversion efficiencies exceeding 30% and with modest atomic density-length (NL) products (scale 10(14) cm(-2)) and optical power densities (10-100 kW/cm(2)).

  View details for PubMedID 10990930

• Eigenvectors of a raman medium Physical review letters Yavuz, D. D., Sokolov, A. V., Harris, S. E. 2000; 84 (1): 75-8

  Abstract

  We show the existence of discrete sets of Raman sidebands which self-consistently establish a Raman coherence and propagate without change in amplitude and relative phase. Equivalently, there exist periodic femtosecond-time-scale, temporal pulse shapes which propagate without change in shape.

  View details for PubMedID 11015838

• Efficient gas-phase VUV frequency up-conversion IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS Merriam, A. J., Sharpe, S. J., Xia, H., Manuszak, D. A., Yin, G. Y., Harris, S. E. 1999; 5 (6): 1502-1509

  View details for Web of Science ID 000084760700011

• Nonlinear optics at low light levels PHYSICAL REVIEW LETTERS Harris, S. E., Hau, L. V. 1999; 82 (23): 4611-4614

  View details for Web of Science ID 000080682300011

• Electromagnetically induced transparency with spectator momenta PHYSICAL REVIEW A Xia, H., Merriam, A. J., Sharpe, S. J., Yin, G. Y., Harris, S. E. 1999; 59 (5): R3190-R3193

  View details for Web of Science ID 000080383100011

• Efficient gas-phase generation of coherent vacuum ultraviolet radiation OPTICS LETTERS Merriam, A. J., Sharpe, S. J., Xia, H., Manuszak, D., Yin, G. Y., Harris, S. E. 1999; 24 (9): 625-627

  Abstract

  We report the demonstration of a pulsed atomic lead (Pb) vapor-based vacuum ultraviolet frequency converter from 233 to 186 nm with unity photon-conversion efficiency. This conversion is attained without phase matching.

  View details for Web of Science ID 000080074300018

  View details for PubMedID 18073804

• Subfemtosecond pulse generation by rotational molecular modulation OPTICS LETTERS Sokolov, A. V., Yavuz, D. D., Harris, S. E. 1999; 24 (8): 557-559

  Abstract

  We extend a recent suggestion for the generation of subfemtosecond pulses by molecular modulation [Phys. Rev. Lett. 81, 2894 (1998)] to the rotational spectrum of molecular hydrogen (H(2)) . When a rotational transition |a? ? |b? is strongly driven (|rho(ab) |=0.5) the generation and phase-slip lengths are of the same order and the Raman spectrum has approximately Bessel function sideband amplitudes. Numerical simulation predicts that this spectrum (generated in a 14-cm-long cell at 1-atm pressure of H(2)) will compress into a train of pulses with 94-fs pulse separation and a pulse length of 0.5 fs.

  View details for Web of Science ID 000079773600019

  View details for PubMedID 18071571

• Light speed reduction to 17 metres per second in an ultracold atomic gas NATURE Hau, L. V., Harris, S. E., Dutton, Z., Behroozi, C. H. 1999; 397 (6720): 594-598

  View details for Web of Science ID 000078738500043

• Photon switching by quantum interference PHYSICAL REVIEW LETTERS Harris, S. E., Yamamoto, Y. 1998; 81 (17): 3611-3614

  View details for Web of Science ID 000076616000015

• Subfemtosecond pulse generation by molecular modulation PHYSICAL REVIEW LETTERS Harris, S. E., Sokolov, A. V. 1998; 81 (14): 2894-2897

  View details for Web of Science ID 000076231900015

• Nonlinear optics at maximum coherence 11th International Vavilov Conference on Nonlinear Optics Sokolov, A. V., Yin, G. Y., Harris, S. E. SPIE - INT SOC OPTICAL ENGINEERING. 1998: 26–34

  View details for Web of Science ID 000077140200004

• Nonlinear optics at maximum coherence Royal-Society-of-London Discussion Meeting on Highlights in Quantum Optics Harris, S. E., Yin, G. Y., Jain, M., Xia, H., Merriam, A. J. ROYAL SOC. 1997: 2291–2304

  View details for Web of Science ID 000071098300009

• Electromagnetically induced transparency in atoms with hyperfine structure PHYSICAL REVIEW A Xia, H., Sharpe, S. J., Merriam, A. J., Harris, S. E. 1997; 56 (5): R3362-R3365

  View details for Web of Science ID A1997YF52900012

• Electromagnetically induced transparency PHYSICS TODAY Harris, S. E. 1997; 50 (7): 36-42

  View details for Web of Science ID A1997XG69800012

• Broadband spectral generation with refractive index control PHYSICAL REVIEW A Harris, S. E., Sokolov, A. V. 1997; 55 (6): R4019-R4022

  View details for Web of Science ID A1997XE37200011

• Optical parametric oscillators pumped by population-trapped atoms OPTICS LETTERS Harris, S. E., Jain, M. 1997; 22 (9): 636-638

  Abstract

  We describe an optical parametric oscillator that is pumped by population-trapped atoms that are prepared with maximum coherence. The oscillator is based on the use of an effective nonlinear susceptibility that is of the same order as the linear susceptibility. Because the parametric gain is obtained in a single coherence length, the gain bandwidth can exceed the degenerate frequency. In Pb vapor the calculated gain is maximized at 1.88 microm and has a bandwidth of ~7500 cm(-1).

  View details for Web of Science ID A1997WW16100020

  View details for PubMedID 18185615

• Electromagnetically induced transparency in an ideal plasma PHYSICAL REVIEW LETTERS Harris, S. E. 1996; 77 (27): 5357-5360

  View details for Web of Science ID A1996WA09300012

• Efficient nonlinear frequency conversion with maximal atomic coherence PHYSICAL REVIEW LETTERS Jain, M., Xia, H., Yin, G. Y., Merriam, A. J., Harris, S. E. 1996; 77 (21): 4326-4329

  View details for Web of Science ID A1996VT69200012

• Measurement of Lorentzian linewidths by pulse propagation delay PHYSICAL REVIEW A KASAPI, A., Yin, G. Y., Jain, M., Harris, S. E. 1996; 53 (6): 4547-4555

  View details for Web of Science ID A1996UR60500109

• Nonlinear-optical properties of a noninteracting Bose gas OPTICS LETTERS Kasevich, M. A., Harris, S. E. 1996; 21 (9): 677-679

  Abstract

  We show that the characteristic Rabi frequency and nonlinear susceptibility of atoms in a dilute Bose gas remain unchanged by the process of condensation. We neglect the effects of atomic dipole-dipole interactions and spontaneous emission.

  View details for Web of Science ID A1996UG32200019

  View details for PubMedID 19876122

• Femtosecond-pulse-driven 10-Hz 41.8-nm laser in Xe IX JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS Lemoff, B. E., Yin, G. Y., Gordon, C. L., Barty, C. P., Harris, S. E. 1996; 13 (1): 180-184

  View details for Web of Science ID A1996TP06000024

• Multiterawatt femtosecond lasers for high field physics Tamura Symposium on the Future of Accelerator Physics Barty, C. P., Gordon, C. L., Harris, S. E., Lemoff, B. E., Raksi, F., ROSEPETRUCK, C., Wilson, K. R., YakovleV, V. V., Yamakawa, K., Yin, G. Y. AMER INST PHYSICS. 1996: 310–21

  View details for Web of Science ID A1996BF24T00021

• Applications of a 30-fs multiterawatt laser .B. Field-ionization-driven, electron-pumped XUV lasers 12th International Conference on Laser Interaction and Related Plasma Phenomena Barty, C. P., Gordon, C. L., Lemoff, B. E., Yin, G. Y., Harris, S. E. AMER INST PHYSICS. 1996: 784–89

  View details for Web of Science ID A1996BF97V00118

• Electromagnetically induced transparency 7th Rochester Conference on Coherence and Quantum Optics Harris, S. E., Yin, G. Y., KASAPI, A., Jain, M., Luo, Z. F. PLENUM PRESS DIV PLENUM PUBLISHING CORP. 1996: 295–304

  View details for Web of Science ID A1996BG08Q00036

• ELIMINATION OF OPTICAL SELF-FOCUSING BY POPULATION TRAPPING PHYSICAL REVIEW LETTERS Jain, M., Merriam, A. J., KASAPI, A., Yin, G. Y., Harris, S. E. 1995; 75 (24): 4385-4388

  View details for Web of Science ID A1995TJ63000012

• FEMTOSECOND-PULSE-DRIVEN ELECTRON-EXCITED EXTREME-ULTRAVIOLET LASERS IN BE-LIKE IONS OPTICS LETTERS Hooker, S. M., Harris, S. E. 1995; 20 (19): 1994-1996

  Abstract

  A suggestion for the generation of extreme-ultraviolet (XUV) laser radiation based on tunneling ionization and subsequent electron excitation of Deltan not equal 0 transitions is described. The favorable scaling of the required intensity of the pump laser with the output XUV wavelength is compared with that exhibited by XUV lasers ased on Deltan = 0 transitions. Calculations for Be-like Ne predict signif icant gain at 14.1 nm.

  View details for Web of Science ID A1995RW11400022

  View details for PubMedID 19862228

• ELECTROMAGNETICALLY INDUCED TRANSPARENCY - PROPAGATION DYNAMICS PHYSICAL REVIEW LETTERS KASAPI, A., Jain, M., Yin, G. Y., Harris, S. E. 1995; 74 (13): 2447-2450

  View details for Web of Science ID A1995QP22900011

• DEMONSTRATION OF A 1O-HZ FEMTOSECOND PULSE-DRIVEN XUV LASER AT 41.8-NM IN XE-IX PHYSICAL REVIEW LETTERS Lemoff, B. E., Yin, G. Y., Gordon, C. L., Barty, C. P., Harris, S. E. 1995; 74 (9): 1574-1577

  View details for Web of Science ID A1995QJ43100020

• Demonstration of a 10-Hz, 41.8 nm laser 1995 Annual/8th Annual Meeting of the IEEE Lasers-and-Electro-Optics-Society (LEOS 95) Lemoff, B. E., Yin, G. Y., Gordon, C. L., Barty, C. P., Harris, S. E. IEEE. 1995: A319–A320

  View details for Web of Science ID A1995BE49N00151

• REFRACTIVE-INDEX CONTROL WITH STRONG FIELDS OPTICS LETTERS Harris, S. E. 1994; 19 (23): 2018-2020

  Abstract

  An electromagnetically induced transparency-like effect is described that allows a strong laser to control and reduce to unity the refractive index of a weak probe. A lossless multistate system with all states far from resonance is considered.

  View details for Web of Science ID A1994PU97400034

  View details for PubMedID 19855728

• FEMTOSECOND-PULSE-DRIVEN, ELECTRON-EXCITED XUV LASERS IN 8-TIMES-IONIZED NOBLE-GASES OPTICS LETTERS Lemoff, B. E., Barty, C. P., Harris, S. E. 1994; 19 (8): 569-571

  Abstract

  We propose three XUV laser schemes in the 30-50-nm wavelength region that can be driven by 10-Hz ultrashort-pulse terawatt laser systems. Tunneling ionization by circularly polarized radiation produces both the ions and hot electrons necessary to excite the upper laser level.

  View details for Web of Science ID A1994NF31600019

  View details for PubMedID 19844375

• NORMAL-MODES FOR ELECTROMAGNETICALLY INDUCED TRANSPARENCY PHYSICAL REVIEW LETTERS Harris, S. E. 1994; 72 (1): 52-55

  View details for Web of Science ID A1994MP86700014

• ATOMIC-SCALE TEMPORAL STRUCTURE INHERENT TO HIGH-ORDER HARMONIC-GENERATION OPTICS COMMUNICATIONS Harris, S. E., Macklin, J. J., Hansch, T. W. 1993; 100 (5-6): 487-490

  View details for Web of Science ID A1993LL31200015

• OBSERVATION OF ELECTROMAGNETICALLY INDUCED PHASE-MATCHING OPTICS LETTERS Jain, M., Yin, G. Y., Field, J. E., Harris, S. E. 1993; 18 (12): 998-1000

  Abstract

  We report the observation of electromagnetically induced phase matching in collisionally broadened Pb vapor. At a critical intensity at which the Rabi frequency of a dressing 1064-nm laser overcomes the Doppler broadening of the vapor, the generated four-frequency-mixing signal at 283 nm increases in a steplike manner by a factor of 59.

  View details for Web of Science ID A1993LF88900022

  View details for PubMedID 19823271

• ELECTROMAGNETICALLY INDUCED TRANSPARENCY WITH MATCHED PULSES PHYSICAL REVIEW LETTERS Harris, S. E. 1993; 70 (5): 552-555

  View details for Web of Science ID A1993KK24800009

• STUDIES OF A 96.9-NM LASER IN NEUTRAL CESIUM PHYSICAL REVIEW A Barty, C. P., Yin, G. Y., Field, J. E., King, D. A., Hahn, K. H., Young, J. F., Harris, S. E. 1992; 46 (7): 4286-4296

  View details for Web of Science ID A1992JV10900090

• MEV X-RAY GENERATION WITH A FEMTOSECOND LASER PHYSICAL REVIEW LETTERS Kmetec, J. D., Gordon, C. L., Macklin, J. J., Lemoff, B. E., Brown, G. S., Harris, S. E. 1992; 68 (10): 1527-1530

  View details for Web of Science ID A1992HG68000022

• ELECTROMAGNETICALLY INDUCED TRANSPARENCY IN SR VAPOR 10TH INTERNATIONAL CONF ON LASER SPECTROSCOPY ( TENICOLS 91 ) N Boller, K. J., Imamoglu, A., Harris, S. E. WORLD SCIENTIFIC PUBL CO PTE LTD. 1992: 295–300

  View details for Web of Science ID A1992BV96Z00061

• OBSERVATION OF ELECTROMAGNETICALLY INDUCED TRANSPARENCY IN COLLISIONALLY BROADENED LEAD VAPOR PHYSICAL REVIEW LETTERS Field, J. E., Hahn, K. H., Harris, S. E. 1991; 67 (22): 3062-3065

  View details for Web of Science ID A1991GR17000005

• 116-NM H-2 LASER PUMPED BY A TRAVELING-WAVE PHOTOIONIZATION ELECTRON SOURCE PHYSICAL REVIEW LETTERS BENEROFE, S. J., Yin, G. Y., Barty, C. P., Young, J. F., Harris, S. E. 1991; 66 (24): 3136-3139

  View details for Web of Science ID A1991FR05100013

• OBSERVATION OF ELECTROMAGNETICALLY INDUCED TRANSPARENCY PHYSICAL REVIEW LETTERS Boller, K. J., Imamoglu, A., Harris, S. E. 1991; 66 (20): 2593-2596

  View details for Web of Science ID A1991FM03600013

• LASERS WITHOUT INVERSION - A CLOSED LIFETIME BROADENED SYSTEM PHYSICAL REVIEW LETTERS Imamoglu, A., Field, J. E., Harris, S. E. 1991; 66 (9): 1154-1156

  View details for Web of Science ID A1991FA34900013

• ELECTROMAGNETICALLY INDUCED TRANSPARENCY 5TH TOPICAL MEETING ON SHORT-WAVELENGTH COHERENT RADIATION : GENERATION AND APPLICATIONS / SPECIAL TOPICAL MEETING ON SOFT-X-RAY PROJECTION LITHOGRAPHY Imamoglu, A., Boller, K. J., Harris, S. E. OPTICAL SOC AMERICA. 1991: 257–261

  View details for Web of Science ID A1991BW05V00055

• 2-HZ 109-NM MIRRORLESS LASER JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS Sher, M. H., BENEROFE, S. J., Young, J. F., Harris, S. E. 1991; 8 (1): 114-116

  View details for Web of Science ID A1991EQ81500016

• NONLINEAR GENERATION OF 104.8-NM RADIATION WITHIN AN ABSORPTION WINDOW IN ZINC PHYSICAL REVIEW LETTERS Hahn, K. H., King, D. A., Harris, S. E. 1990; 65 (22): 2777-2779

  View details for Web of Science ID A1990EJ59800008

• NONLINEAR OPTICAL PROCESSES USING ELECTROMAGNETICALLY INDUCED TRANSPARENCY PHYSICAL REVIEW LETTERS Harris, S. E., Field, J. E., Imamoglu, A. 1990; 64 (10): 1107-1110

  View details for Web of Science ID A1990CQ97000010

• PHOTO-ELECTRON AND PHOTOIONIZATION PUMPING OF XUV LASERS BY LASER-PRODUCED PLASMAS INSTITUTE OF PHYSICS CONFERENCE SERIES Barty, C. P., Yin, G. Y., Field, J. E., BENEROFE, S. J., Young, J. F., Harris, S. E. 1990: 21-28

  View details for Web of Science ID A1990HR11700005

• INTERFERENCE OF LIFETIME BROADENED RESONANCES - NONRECIPROCAL GAIN AND LOSS PROFILES NATO ADVANCED STUDY INST ON NEW FRONTIERS IN QUANTUM ELECTRODYNAMICS AND QUANTUM OPTICS Imamoglu, A., Macklin, J. J., Harris, S. E. PLENUM PRESS DIV PLENUM PUBLISHING CORP. 1990: 223–229

  View details for Web of Science ID A1990BT31Q00014

• LASERS WITHOUT INVERSION - INTERFERENCE OF DRESSED LIFETIME-BROADENED STATES OPTICS LETTERS Imamoglu, A., Harris, S. E. 1989; 14 (24): 1344-1346

  Abstract

  We describe the use of a coupling electromagnetic field to provide a general method of producing inversion-free laser systems. The interference between dressed states produces a zero in absorption while allowing gains of the order of that of the uncoupled system.

  View details for Web of Science ID A1989CE68900002

  View details for PubMedID 19759677

• LASERS WITHOUT INVERSION - INTERFERENCE OF LIFETIME-BROADENED RESONANCES PHYSICAL REVIEW LETTERS Harris, S. E. 1989; 62 (9): 1033-1036

  View details for Web of Science ID A1989T371600014

• EXTREME-ULTRAVIOLET FLUORESCENCE FROM CORE-EXCITED LEVELS OF NEUTRAL RUBIDIUM OPTICS LETTERS SPONG, J. K., Imamoglu, A., Kmetec, J. D., Harris, S. E. 1989; 14 (3): 168-170

  Abstract

  Strong extreme-ultraviolet fluorescence originating from core-excited autoionizing levels of neutral Rb is observed. Radiative branching ratios approaching unity are inferred from the radiative yields. Long autoionizing lifetimes and fast radiative rates make these levels promising candidates for extreme-ultraviolet laser systems.

  View details for Web of Science ID A1989T167500007

  View details for PubMedID 19749858

• LASER-DEPLETION SPECTROSCOPY OF CORE-EXCITED LEVELS OF NEUTRAL RUBIDIUM PHYSICAL REVIEW A SPONG, J. K., Imamoglu, A., Buffa, R., Harris, S. E. 1988; 38 (11): 5617-5626

  View details for Web of Science ID A1988R234200017

• 12.8-EV LASER IN NEUTRAL CESIUM PHYSICAL REVIEW LETTERS Barty, C. P., King, D. A., Yin, G. Y., Hahn, K. H., Field, J. E., Young, J. F., Harris, S. E. 1988; 61 (19): 2201-2204

  View details for Web of Science ID A1988Q786300012

• MIXED-SPECIES TARGETS FOR FEMTOSECOND-TIME-SCALE X-RAY GENERATION PHYSICAL REVIEW LETTERS Harris, S. E., Kmetec, J. D. 1988; 61 (1): 62-65

  View details for Web of Science ID A1988P028900016

• OBSERVATION OF SUPER COSTER-KRONIG-PUMPED GAIN IN ZN-III OPTICS LETTERS Walker, D. J., Barty, C. P., Yin, G. Y., Young, J. F., Harris, S. E. 1987; 12 (11): 894-896

  Abstract

  We report the observation of laser gain in the vacuum ultraviolet pumped by super Coster-Kronig decay. Using a 5-J, 300-psec pump pulse of 1064-nm radiation, we have observed gain on transitions in Zn III at 127.0, 130.6, and 131.9 nm with total gains of exp(2.4), exp(5.1), and exp(3.2), respectively. The large branching ratios of the rapid super Coster-Kronig decay into a small number of final levels makes high-efficiency operation possible.

  View details for Web of Science ID A1987K531500014

  View details for PubMedID 19741907

• SATURATION OF THE XE-III 109-NM LASER USING TRAVELING-WAVE LASER-PRODUCED-PLASMA EXCITATION OPTICS LETTERS Sher, M. H., Macklin, J. J., Young, J. F., Harris, S. E. 1987; 12 (11): 891-893

  Abstract

  We describe the construction and operation of a 109-nm, photoionization-pumped, single-pass laser in Xe III. The laser is pumped by soft x rays emitted from a laser-produced plasma in a traveling-wave geometry. Using a 3.5-J, 300-psec, 1064-nm laser pump pulse, we measure a small-signal gain coefficient of 4.4 cm(-1) and a total small-signal gain of exp(40). The laser is fully saturated and produces an output energy of 20 microJ in a beam with 10-mrad divergence.

  View details for Web of Science ID A1987K531500013

  View details for PubMedID 19741906

• LASER SPECTROSCOPY OF CORE-EXCITED LEVELS OF NEUTRAL RUBIDIUM PHYSICAL REVIEW LETTERS SPONG, J. K., Kmetec, J. D., Wallace, S. C., Young, J. F., Harris, S. E. 1987; 58 (25): 2631-2634

  View details for Web of Science ID A1987H804400006

• LOW-ENERGY PUMPING OF A 108.9-NM XENON AUGER LASER OPTICS LETTERS Yin, G. Y., Barty, C. P., King, D. A., Walker, D. J., Harris, S. E., Young, J. F. 1987; 12 (5): 331-333

  Abstract

  We report extensive measurements of gain in the Xe III system initially observed by Kapteyn et al. [Phys. Rev. Lett. 57, 2939 (1986)]. The dependence of this gain on pressure, pumping-pulse length, and pump energy is presented. By optimizing these parameters we have achieved a gain of exp(3.2) by using only 0.56 J of 1064-nm energy on target, representing an efficiency improvement of nearly 100. Total gains as high as exp(6.6) have been measured when using higher energies. Our data indicate that effective laser-produced plasmas can be created with applied power densities as low as 5 x 10(10) W cm(-2).

  View details for Web of Science ID A1987H017200011

  View details for PubMedID 19738881

• CORE-EXCITED METASTABLE LEVELS - APPLICATION TO SPECTROSCOPY, TO THE GENERATION OF PICOSECOND EXTREME-ULTRAVIOLET PULSES, AND TO LASERS JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS Harris, S. E., Young, J. F. 1987; 4 (4): 547-562

  View details for Web of Science ID A1987K232000013

• EMISSION-SPECTRA OF QUASIMETASTABLE LEVELS OF ALKALI-METAL ATOMS PHYSICAL REVIEW A MENDELSOHN, A. J., Barty, C. P., Sher, M. H., Young, J. F., Harris, S. E. 1987; 35 (5): 2095-2101

  View details for Web of Science ID A1987G975600012

• GRAZING-INCIDENCE ELLIPSOIDAL REFLECTOR FOR LONGITUDINALLY PUMPING SHORT-WAVELENGTH LASERS OPTICS LETTERS Young, J. F., Macklin, J. J., Harris, S. E. 1987; 12 (2): 90-92

  Abstract

  We propose using a prolate ellipsoid for collecting and focusing soft-x-ray radiation from a laser-produced plasma to longitudinally pump short-wavelength lasers. Total collection efficiencies greater than 20% at 10 nm into gain regions with aspect ratios of 25 are possible. This geometry offers several advantages with respect to present transverse multiple-spot geometries.

  View details for Web of Science ID A1987F829900008

  View details for PubMedID 19738802

• PROPOSAL FOR AN EXTREME-ULTRAVIOLET AUGER LASER AT 63.8 NM IN CS-III JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS Walker, D. J., Caro, R. G., Harris, S. E. 1986; 3 (11): 1515-1518

  View details for Web of Science ID A1986E738300002

• IDENTIFICATION AND OSCILLATOR-STRENGTH MEASUREMENT OF THE 109.1-NM TRANSITION IN NEUTRAL CS OPTICS LETTERS Pedrotti, K. D., DIMIDUK, D. P., Young, J. F., Harris, S. E. 1986; 11 (7): 425-427

  Abstract

  The 109.1-nm transition in neutral Cs is the prototype of a class of transitions that originate from doubly excited quasi-metastable quartet levels. In this Letter we describe experiments that use tunable VUV radiation to determine the identity of this transition, to measure its oscillator strength, and to estimate its hyperfine splitting.

  View details for Web of Science ID A1986C992500007

  View details for PubMedID 19730652

• SHAKE-UP AS A MECHANISM FOR VACUUM ULTRAVIOLET-LASERS OPTICS LETTERS Harris, S. E., Caro, R. G. 1986; 11 (1): 10-11

  View details for Web of Science ID A1986AXL6600004

  View details for PubMedID 19730515

• EXTREME-ULTRAVIOLET EMISSION-SPECTRA OF CORE-EXCITED LEVELS IN SODIUM AND MAGNESIUM JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS Pedrotti, K. D., MENDELSOHN, A. J., Falcone, R. W., Young, J. F., Harris, S. E. 1985; 2 (12): 1942-1947

  View details for Web of Science ID A1985AWZ5900011

• PROPOSAL FOR AN EXTREME-ULTRAVIOLET SELECTIVE AUTOIONIZATION LASER IN ZN-III OPTICS LETTERS MENDELSOHN, A. J., Harris, S. E. 1985; 10 (3): 128-130

  Abstract

  A system is proposed whereby Zn atoms that are photoionized by soft x rays from a laser-produced plasma undergo selective super-Coster-Kronig decay leading to inversion and lasing on several XUV Zn III transitions. Calculations indicate that lasing will occur when a moderate-sized (~10-J) 1.06-microm pump laser is used.

  View details for Web of Science ID A1985ACQ0200010

  View details for PubMedID 19724368

• LASER SPECTROSCOPY OF NA-I QUARTETS PHYSICAL REVIEW A Holmgren, D. E., Walker, D. J., King, D. A., Harris, S. E. 1985; 31 (2): 677-683

  View details for Web of Science ID A1985ABC5000017

• QUASI-METASTABLE QUARTET LEVELS IN ALKALI-LIKE ATOMS AND IONS OPTICS LETTERS Harris, S. E., Walker, D. J., Caro, R. G., MENDELSOHN, A. J., Cowan, R. D. 1984; 9 (5): 168-170

  Abstract

  We describe the properties of a subclass of quartet levels of alkalilike atoms and ions that often retain metastability against autoionization and may have large radiative yields. Gain cross sections for XUV lasers with wavelengths between 20 and 100 nm are given.

  View details for Web of Science ID A1984SP80800008

  View details for PubMedID 19721532

• EMISSION AT 1091-A IN NEUTRAL CORE-EXCITED CS AIP CONFERENCE PROCEEDINGS Holmgren, D. E., Walker, D. J., Harris, S. E. 1984: 496-501

  View details for Web of Science ID A1984TL09000053

• GROTRIAN DIAGRAM OF THE QUARTET SYSTEM OF NA-I AIP CONFERENCE PROCEEDINGS Holmgren, D. E., Walker, D. J., King, D. A., Harris, S. E. 1984: 157-161

  View details for Web of Science ID A1984TL09000015

• USE OF LASER-PRODUCED SOFT X-RAYS FOR THE PRODUCTION OF EXCITED METASTABLE IONS PHYSICAL REVIEW A Caro, R. G., Wang, J. C., Young, J. F., Harris, S. E. 1984; 30 (3): 1407-1418

  View details for Web of Science ID A1984TG03500030

• THE EXCITATION OF METASTABLE EXTREME ULTRAVIOLET LEVELS AIP CONFERENCE PROCEEDINGS Caro, R. G., Wang, J. C., Young, J. F., Harris, S. E. 1984: 417-426

  View details for Web of Science ID A1984TL09000045

• MEASUREMENT OF LITHIUM AND SODIUM METASTABLE QUARTET ATOMS IN A HOLLOW-CATHODE DISCHARGE OPTICS LETTERS Holmgren, D. E., Falcone, R. W., Walker, D. J., Harris, S. E. 1984; 9 (3): 85-87

  Abstract

  We report the measurement, in a pulsed hollow-cathode discharge, of metastable quartet atoms of Li and Na. By using a tunable probe laser, population densities of 3x10(10) atoms cm(-3) and 10(11) atoms cm(-3) were measured in the Li(1s2s2p)4P degrees and Na(2p(5)3s3p)(4)D(7/2) levels, respectively. These levels are candidates for energy storage for extreme-ultraviolet lasers.

  View details for Web of Science ID A1984SD67500008

  View details for PubMedID 19721504

• NOVEL SHORT-PULSE PHOTO-IONIZATION ELECTRON SOURCE - LI(1S2S2P)P-4-DEGREES DEEXCITATION MEASUREMENTS IN A PLASMA PHYSICAL REVIEW LETTERS Wang, J. C., Caro, R. G., Harris, S. E. 1983; 51 (9): 767-770

  View details for Web of Science ID A1983RE16100013

• SOFT-X-RAY PUMPING OF METASTABLE LEVELS OF LI+ APPLIED PHYSICS LETTERS Caro, R. G., Wang, J. C., Falcone, R. W., Young, J. F., Harris, S. E. 1983; 42 (1): 9-11

  View details for Web of Science ID A1983PV07000004

• SPONTANEOUS RAMAN-SCATTERING AS A HIGH-RESOLUTION XUV RADIATION SOURCE IEEE JOURNAL OF QUANTUM ELECTRONICS Rothenberg, J. E., Young, J. F., Harris, S. E. 1983; 19 (12): 1795-1804

  View details for Web of Science ID A1983SE80400012

• ANTI-STOKES SCATTERING AS AN XUV RADIATION SOURCE AND FLASHLAMP AIP CONFERENCE PROCEEDINGS Harris, S. E., Young, J. F., Falcone, R. W., Rothenberg, J. E., Willison, J. R., Wang, J. C. 1982: 137-152

  View details for Web of Science ID A1982PK83400018

• IMPROVED PERFORMANCE OF THE MICROWAVE-PUMPED XECL LASER IEEE JOURNAL OF QUANTUM ELECTRONICS WISOFF, P. J., MENDELSOHN, A. J., Harris, S. E., Young, J. F. 1982; 18 (11): 1839-1840

  View details for Web of Science ID A1982PX80600006

• PROPOSAL FOR HIGH-POWER RADIATIVE-COLLISIONAL LASERS OPTICS LETTERS Harris, S. E., Falcone, R. W., OBRIEN, D. M. 1982; 7 (9): 397-398

  Abstract

  We propose the use of the radiative-collisional laser process for the extraction of energy that is stored in the resonance lines of the alkali atoms. The largest calculated gain occurs in Rb at 5.4 microm and is 8%/cm at a resonance-line population of 5 x 10(16) atoms/cm(3).

  View details for Web of Science ID A1982PE07300001

  View details for PubMedID 19714034

• MICROWAVE EXCITATION OF EXCIMER LASERS LASER FOCUS WITH FIBEROPTIC TECHNOLOGY Young, J. F., Harris, S. E., WISOFF, P. J., MENDELSOHN, A. J. 1982; 18 (4): 63-67

  View details for Web of Science ID A1982NL24200003

• LASER TECHNIQUES FOR SPECTROSCOPY OF CORE-EXCITED ATOMIC LEVELS JOURNAL DE PHYSIQUE Harris, S. E., Young, J. F., Falcone, R. W., Rothenberg, J. E., Willison, J. R. 1982; 43 (NC2): 243-254

  View details for Web of Science ID A1982PZ53800019

• HIGH-RESOLUTION EXTREME-ULTRAVIOLET SPECTROSCOPY OF POTASSIUM USING ANTI-STOKES RADIATION OPTICS LETTERS Rothenberg, J. E., Young, J. F., Harris, S. E. 1981; 6 (8): 363-365

  Abstract

  We report the use of a new extreme-ultraviolet radiation source based on spontaneous anti-Stokes scattering for high-resolution absorption spectroscopy of transitions originating from the 3p(6) shell of potassium. The region from 546.6 to 536.8 A is scanned at a resolution of about 1.2 cm(-1). Within this region, four previously unreported lines are observed.

  View details for Web of Science ID A1981MA40000003

  View details for PubMedID 19701433

• LASER SPECTROSCOPY OF METASTABLE EXTREME-ULTRAVIOLET LEVELS IN LITHIUM ATOMS AND IONS PHYSICAL REVIEW LETTERS Willison, J. R., Falcone, R. W., Young, J. F., Harris, S. E. 1981; 47 (25): 1827-1829

  View details for Web of Science ID A1981MU50600017

• A MICROWAVE-PUMPED XECL-STAR LASER APPLIED PHYSICS LETTERS MENDELSOHN, A. J., Normandin, R., Harris, S. E., Young, J. F. 1981; 38 (8): 603-605

  View details for Web of Science ID A1981LK75100008

• XUV-LASERS BY QUARTET TO DOUBLET ENERGY-TRANSFER IN ALKALI ATOMS IEEE JOURNAL OF QUANTUM ELECTRONICS Rothenberg, J. E., Harris, S. E. 1981; 17 (3): 418-422

  View details for Web of Science ID A1981LE76100028

• LASER-INDUCED CHARGE-TRANSFER COLLISIONS OF CALCIUM-IONS WITH STRONTIUM ATOMS PHYSICAL REVIEW A Wright, M. D., OBRIEN, D. M., Young, J. F., Harris, S. E. 1981; 24 (4): 1750-1755

  View details for Web of Science ID A1981ML75100013

• PROPOSAL FOR A 207-A LASER IN LITHIUM OPTICS LETTERS Harris, S. E. 1980; 5 (1): 1-3

  View details for Web of Science ID A1980JA76700001

  View details for PubMedID 19693102

• EMISSION-SPECTRA OF CORE EXCITED EVEN-PARITY 2P STATES OF NEUTRAL LITHIUM PHYSICAL REVIEW LETTERS Willison, J. R., Falcone, R. W., Wang, J. C., Young, J. F., Harris, S. E. 1980; 44 (17): 1125-1128

  View details for Web of Science ID A1980JQ16500009

• LASER-INDUCED CHARGE-TRANSFER TO AN EXCITED IONIC STATE PHYSICAL REVIEW LETTERS Green, W. R., Wright, M. D., Young, J. F., Harris, S. E. 1979; 43 (2): 120-123

  View details for Web of Science ID A1979HB47700010

• OBSERVATION OF A LASER-INDUCED DIPOLE-QUADRUPOLE COLLISION OPTICS LETTERS Green, W. R., Wright, M. D., Lukasik, J., Young, J. F., Harris, S. E. 1979; 4 (9): 265-267

  Abstract

  Experimental observation of a laser-induced dipole-quadrupole collision between Sr and Ca is reported. The laser-induced collision cross section peaks at an applied photon energy equal to the energy defect of the initial and final states of the infinitely separated atoms. A cross section of 3 x 10(-14) cm(2) was induced at a laser-power density of 7 x 10(9) W/cm(2); the linewidth was 20 cm(-1).

  View details for Web of Science ID A1979HJ20100002

  View details for PubMedID 19687871

• OBSERVATION OF ATOMIC-PAIR ABSORPTION WITH AN INCOHERENT SOURCE OPTICS LETTERS White, J. C., ZDASIUK, G. A., Young, J. F., Harris, S. E. 1979; 4 (5): 137-139

  Abstract

  We report the observation of atomic-pair absorption in barium and in barium-thallium vapors using a white-light source. At atomic densities on the order of 10(17) atoms/cm(3) we measure absorptions of 2.9% cm(-1) for Ba-Ba and 2.3% cm(-1) for Ba-TI. In both cases, the absorption maxima occur at the predicted (R = infinity) wavelength and have a full width at half maximum of approximately 15 cm(-1).

  View details for Web of Science ID A1979GT50800004

  View details for PubMedID 19687826

• MEASUREMENT OF LARGE CROSS-SECTIONS FOR LASER-INDUCED COLLISIONS PHYSICAL REVIEW LETTERS Green, W. R., Lukasik, J., Willison, J. R., Wright, M. D., Young, J. F., Harris, S. E. 1979; 42 (15): 970-973

  View details for Web of Science ID A1979GR21800012

• MEASUREMENT OF HE 1S2S S-1(0) ISOTOPIC SHIFT USING A TUNABLE VUV ANTI-STOKES LIGHT-SOURCE OPTICS LETTERS Falcone, R. W., Willison, J. R., Young, J. F., Harris, S. E. 1978; 3 (5): 162-163

  Abstract

  We describe a high-resolution, vacuum-ultraviolet spectroscopic technique based on a tunable, narrow-band, VUV, spontaneous anti-Stokes light source. The technique was used to measure the absolute energies of the 1s2s (1)S(0) states of (3)He and (4)He; the 1s2s (1)S(0) level of (3)He is 7.8 +/- 0.5 cm(-1) below that of (4)He.

  View details for Web of Science ID A1978FU41600002

  View details for PubMedID 19684732

• OBSERVATION OF RADIATIVE COLLISIONAL FLUORESCENCE PHYSICAL REVIEW LETTERS White, J. C., ZDASIUK, G. A., Young, J. F., Harris, S. E. 1978; 41 (25): 1709-1712

  View details for Web of Science ID A1978GA23500008

• LASER-INDUCED 2-PHOTON BLACKBODY RADIATION IN VACUUM ULTRAVIOLET PHYSICAL REVIEW LETTERS ZYCH, L. J., Lukasik, J., Young, J. F., Harris, S. E. 1978; 40 (23): 1493-1496

  View details for Web of Science ID A1978FA78500007

• NUMERICAL-ANALYSIS OF LASER-INDUCED INELASTIC-COLLISIONS IEEE JOURNAL OF QUANTUM ELECTRONICS Harris, S. E., White, J. C. 1977; 13 (12): 972-978

  View details for Web of Science ID A1977EE26600009

• SPONTANEOUS ANTI-STOKES SCATTERING AS A HIGH-RESOLUTION AND PICOSECOND-TIME-SCALE VUV LIGHT-SOURCE APPLIED PHYSICS LETTERS Harris, S. E. 1977; 31 (8): 498-500

  View details for Web of Science ID A1977DX57400006

• EFFECT OF LINEWIDTH ON EFFICIENCY OF 2-PHOTON-PUMPED FREQUENCY-CONVERTERS IEEE JOURNAL OF QUANTUM ELECTRONICS Stappaerts, E. A., BEKKERS, G. W., Young, J. F., Harris, S. E. 1976; 12 (6): 330-333

  View details for Web of Science ID A1976BT68600004

• INELASTIC-COLLISION INDUCED BY INTENSE OPTICAL RADIATION PHYSICAL REVIEW LETTERS LIDOW, D. B., Falcone, R. W., Young, J. F., Harris, S. E. 1976; 36 (9): 462-464

  View details for Web of Science ID A1976BG52300003

• EFFICIENT IR IMAGE UP-CONVERSION IN 2-PHOTON RESONANTLY PUMPED CS VAPOR APPLIED PHYSICS LETTERS Stappaerts, E. A., Harris, S. E., Young, J. F. 1976; 29 (10): 669-670

  View details for Web of Science ID A1976CL10000017

• ISOTOPE SEPARATION BY OPTICALLY PUMPED IONIZING COLLISIONS APPLIED PHYSICS LETTERS Harris, S. E., LIDOW, D. B. 1975; 26 (3): 104-105

  View details for Web of Science ID A1975V244000014

• MIXED METAL VAPOR-PHASE MATCHING FOR 3RD-HARMONIC GENERATION APPLIED PHYSICS LETTERS Bloom, D. M., Young, J. F., Harris, S. E. 1975; 27 (7): 390-392

  View details for Web of Science ID A1975AQ43500008

• 3RD HARMONIC-GENERATION IN PHASE-MATCHED ALKALI-METAL VAPORS APPLIED PHYSICS LETTERS Bloom, D. M., BEKKERS, G. W., Young, J. F., Harris, S. E. 1975; 26 (12): 687-689

  View details for Web of Science ID A1975AE52200013

• VACUUM ULTRAVIOLET HOLOGRAPHY APPLIED PHYSICS LETTERS BJORKLUN, G. C., Harris, S. E., Young, J. F. 1974; 25 (8): 451-452

  View details for Web of Science ID A1974U237600009

• NONLINEAR OPTICAL PROCESSES BY VAN DER WAALS INTERACTION DURING COLLISION PHYSICAL REVIEW LETTERS Harris, S. E., LIDOW, D. B. 1974; 33 (12): 674-676

  View details for Web of Science ID A1974U021200002

• INFRARED UP-CONVERSION WITH RESONANTLY 2-PHOTON PUMPED METAL VAPORS APPLIED PHYSICS LETTERS Bloom, D. M., Yardley, J. T., Young, J. F., Harris, S. E. 1974; 24 (9): 427-428

  View details for Web of Science ID A1974S690800013

• RESONANTLY 2-PHOTON PUMPED FREQUENCY CONVERTER APPLIED PHYSICS LETTERS Harris, S. E., Bloom, D. M. 1974; 24 (5): 229-230

  View details for Web of Science ID A1974S290700008

• GENERATION OF VACUUM ULTRAVIOLET AND SOFT-X-RAY RADIATION USING HIGH-ORDER NONLINEAR OPTICAL POLARIZABILITIES PHYSICAL REVIEW LETTERS Harris, S. E. 1973; 31 (6): 341-344

  View details for Web of Science ID A1973Q304900001

• GENERATION OF 1182-A RADIATION IN PHASE-MATCHED MIXTURES OF INERT-GASES APPLIED PHYSICS LETTERS Kung, A. H., Young, J. F., Harris, S. E. 1973; 22 (6): 301-302

  View details for Web of Science ID A1973O788300015

• STIMULATED EMISSION IN MULTIPLE-PHOTON-PUMPED XENON AND ARGON EXCIMERS APPLIED PHYSICS LETTERS Harris, S. E., Kung, A. H., STAPPAER, E. A., Young, J. F. 1973; 23 (5): 232-234

  View details for Web of Science ID A1973Q637700010

• GENERATION OF VACUUM ULTRAVIOLET-RADIATION IN PHASE-MATCHED CD VAPOR PHYSICAL REVIEW LETTERS Kung, A. H., BJORKLUN, G. C., Young, J. F., Harris, S. E. 1972; 29 (15): 985-?

  View details for Web of Science ID A1972N608500004

• ELECTRONIC TUNING OF A DYE LASER USING ACOUSTO-OPTIC FILTER APPLIED PHYSICS LETTERS Taylor, D. J., Harris, S. E., NIEH, S. T., Hansch, T. W. 1971; 19 (8): 269-?

  View details for Web of Science ID A1971K529100008

• THIRD-HARMONIC GENERATION IN PHASE-MATCHED RB VAPOR PHYSICAL REVIEW LETTERS Young, J. F., BJORKLUN, G. C., Kung, A. H., Miles, R. B., Harris, S. E. 1971; 27 (23): 1551-?

  View details for Web of Science ID A1971K954000001