Megan Nantel
Ph.D. Student in Applied Physics, admitted Autumn 2018
All Publications
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Atom Interferometry with Floquet Atom Optics.
Physical review letters
2022; 129 (18): 183202
Abstract
Floquet engineering offers a compelling approach for designing the time evolution of periodically driven systems. We implement a periodic atom-light coupling to realize Floquet atom optics on the strontium ^{1}S_{0}-^{3}P_{1} transition. These atom optics reach pulse efficiencies above 99.4% over a wide range of frequency offsets between light and atomic resonance, even under strong driving where this detuning is on the order of the Rabi frequency. Moreover, we use Floquet atom optics to compensate for differential Doppler shifts in large momentum transfer atom interferometers and achieve state-of-the-art momentum separation in excess of 400ℏk. This technique can be applied to any two-level system at arbitrary coupling strength, with broad application in coherent quantum control.
View details for DOI 10.1103/PhysRevLett.129.183202
View details for PubMedID 36374679
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Attosecond coherent electron motion in Auger-Meitner decay.
Science (New York, N.Y.)
1800: eabj2096
Abstract
[Figure: see text].
View details for DOI 10.1126/science.abj2096
View details for PubMedID 34990213
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Matter-wave Atomic Gradiometer Interferometric Sensor (MAGIS-100)
QUANTUM SCIENCE AND TECHNOLOGY
2021; 6 (4)
View details for DOI 10.1088/2058-9565/abf719
View details for Web of Science ID 000673145000001
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Large Momentum Transfer Clock Atom Interferometry on the 689 nm Intercombination Line of Strontium
PHYSICAL REVIEW LETTERS
2020; 124 (8): 083604
Abstract
We report the first realization of large momentum transfer (LMT) clock atom interferometry. Using single-photon interactions on the strontium ^{1}S_{0}-^{3}P_{1} transition, we demonstrate Mach-Zehnder interferometers with state-of-the-art momentum separation of up to 141 ℏk and gradiometers of up to 81 ℏk. Moreover, we circumvent excited state decay limitations and extend the gradiometer duration to 50 times the excited state lifetime. Because of the broad velocity acceptance of the interferometry pulses, all experiments are performed with laser-cooled atoms at a temperature of 3 μK. This work has applications in high-precision inertial sensing and paves the way for LMT-enhanced clock atom interferometry on even narrower transitions, a key ingredient in proposals for gravitational wave detection and dark matter searches.
View details for DOI 10.1103/PhysRevLett.124.083604
View details for Web of Science ID 000517295000002
View details for PubMedID 32167328
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Tunable isolated attosecond X-ray pulses with gigawatt peak power from a free-electron laser
NATURE PHOTONICS
2020; 14 (1): 30-+
View details for DOI 10.1038/s41566-019-0549-5
View details for Web of Science ID 000504727600007
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Attosecond transient absorption spooktroscopy: a ghost imaging approach to ultrafast absorption spectroscopy.
Physical chemistry chemical physics : PCCP
2019
Abstract
The recent demonstration of isolated attosecond pulses from an X-ray free-electron laser (XFEL) opens the possibility for probing ultrafast electron dynamics at X-ray wavelengths. An established experimental method for probing ultrafast dynamics is X-ray transient absorption spectroscopy, where the X-ray absorption spectrum is measured by scanning the central photon energy and recording the resultant photoproducts. The spectral bandwidth inherent to attosecond pulses is wide compared to the resonant features typically probed, which generally precludes the application of this technique in the attosecond regime. In this paper we propose and demonstrate a new technique to conduct transient absorption spectroscopy with broad bandwidth attosecond pulses with the aid of ghost imaging, recovering sub-bandwidth resolution in photoproduct-based absorption measurements.
View details for DOI 10.1039/c9cp03951a
View details for PubMedID 31793561
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Generation and Characterization of Attosecond Pulses from an X-ray Free-electron Laser
IEEE. 2019
View details for Web of Science ID 000482226301273