Hubert Sylwester Stokowski

All Publications

• Ultra-broadband mid-infrared generation in dispersion-engineered thin-film lithium niobate OPTICS EXPRESS Mishra, J., Jankowski, M., Hwang, A. Y., Stokowski, H. S., McKenna, T. P., Langrock, C., Ng, E., Heydari, D., Mabuchi, H., Safavi-Naeini, A. H., Fejer, M. M. 2022; 30 (18): 32752-32760

  View details for DOI 10.1364/OE.467580

  View details for Web of Science ID 000850229100099

• Ultra-low-power second-order nonlinear optics on a chip. Nature communications McKenna, T. P., Stokowski, H. S., Ansari, V., Mishra, J., Jankowski, M., Sarabalis, C. J., Herrmann, J. F., Langrock, C., Fejer, M. M., Safavi-Naeini, A. H. 2022; 13 (1): 4532

  Abstract

  Second-order nonlinear optical processes convert light from one wavelength to another and generate quantum entanglement. Creating chip-scale devices to efficiently control these interactions greatly increases the reach of photonics. Existing silicon-based photonic circuits utilize the third-order optical nonlinearity, but an analogous integrated platform for second-order nonlinear optics remains an outstanding challenge. Here we demonstrate efficient frequency doubling and parametric oscillation with a threshold of tens of micro-watts in an integrated thin-film lithium niobate photonic circuit. We achieve degenerate and non-degenerate operation of the parametric oscillator at room temperature and tune its emission over one terahertz by varying the pump frequency by hundreds of megahertz. Finally, we observe cascaded second-order processes that result in parametric oscillation. These resonant second-order nonlinear circuits will form a crucial part of the emerging nonlinear and quantum photonics platforms.

  View details for DOI 10.1038/s41467-022-31134-5

  View details for PubMedID 35927246

• High-bandwidth CMOS-voltage-level electro-optic modulation of 780 nm light in thin-film lithium niobate OPTICS EXPRESS Celik, O., Sarabalis, C. J., Mayor, F. M., Stokowski, H. S., Herrmann, J. F., McKenna, T. P., Lee, N. A., Jiang, W., Multani, K. S., Safavi-Naeini, A. H. 2022; 30 (13): 23177-23186

  View details for DOI 10.1364/OE.460119

  View details for Web of Science ID 000813479600073

• High-efficiency second harmonic generation of blue light on thin-film lithium niobate. Optics letters Park, T., Stokowski, H. S., Ansari, V., McKenna, T. P., Hwang, A. Y., Fejer, M. M., Safavi-Naeini, A. H. 2022; 47 (11): 2706-2709

  Abstract

  The strength of interactions between photons in a chi(2) nonlinear optical waveguide increases at shorter wavelengths. These larger interactions enable coherent spectral translation and light generation at a lower power, over a broader bandwidth, and in a smaller device: all of which open the door to new technologies spanning fields from classical to quantum optics. Stronger interactions may also grant access to new regimes of quantum optics to be explored at the few-photon level. One promising platform that could enable these advances is thin-film lithium niobate (TFLN), due to its broad optical transparency window and possibility for quasi-phase matching and dispersion engineering. In this Letter, we demonstrate second harmonic generation of blue light on an integrated thin-film lithium niobate waveguide and observe a conversion efficiency of eta0=33, 000%/W-cm2, significantly exceeding previous demonstrations.

  View details for DOI 10.1364/OL.455046

  View details for PubMedID 35648910

• Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire OPTICA Mishra, J., McKenna, T. P., Ng, E., Stokowski, H. S., Jankowski, M., Langrock, C., Heydari, D., Mabuchi, H., Fejer, M. M., Safavi-Naeini, A. H. 2021; 8 (6): 921-924

  View details for DOI 10.1364/OPTICA.427428

  View details for Web of Science ID 000663363600024

• Fully-Resonant Second Harmonic Generation in Periodically Poled Thin-Film Lithium Niobate McKenna, T. P., Stokowski, H. S., Ansari, V., Mishra, J., Jankowski, M., Sarabalis, C. J., Herrmann, J. F., Langrock, C., Fejer, M. M., Safavi-Naeini, A. H., IEEE IEEE. 2021

  View details for Web of Science ID 000831479801219

• Mid-infrared nonlinear optics in thin-film lithium niobate on sapphire Mishra, J., McKenna, T. P., Ng, E., Stokowski, H. S., Jankowski, M., Langrock, C., Heydari, D., Mabuchi, H., Safavi-Naeini, A. H., Fejer, M. M., IEEE IEEE. 2021

  View details for Web of Science ID 000831479802196

• Optical Parametric Oscillator in Thin-Film Lithium Niobate with a 130 mu W Threshold Stokowski, H. S., McKenna, T. P., Ansari, V., Mishra, J., Jankowski, M., Sarabalis, C. J., Herrmann, J. F., Langrock, C., Fejer, M. M., Safavi-Naeini, A. H., IEEE IEEE. 2021

  View details for Web of Science ID 000831479803278

• Determination of Fermi Level Position at the Graphene/GaN Interface Using Electromodulation Spectroscopy ADVANCED MATERIALS INTERFACES Herman, A. P., Janicki, L., Stokowski, H. S., Rudzinski, M., Rozbiegala, E., Sobanska, M., Zytkiewicz, Z. R., Kudrawiec, R. 2020

  View details for DOI 10.1002/admi.202001220

  View details for Web of Science ID 000572992700001

• Development of a Millimeter-Wave Transducer for Quantum Networks Multani, K. S., Stokowski, H., Snively, E., Patel, R., Jiang, W., Lee, N., Welander, P. B., Nanni, E. A., Safavi-Naeini, A. H., IEEE IEEE. 2020

  View details for DOI 10.1109/IRMMW-THZ46771.2020.9370661

  View details for Web of Science ID 000662887600252

• Depletion Layer Built-In Field at (1-100), (0001), and (000-1) GaN/Water Junction and Its Role in Semiconductor Nanowire Water Splitting ADVANCED MATERIALS INTERFACES Stokowski, H., Janicki, L., Serafinczuk, J., Siekacz, M., Skierbiszewski, C., Kudrawiec, R. 2019; 6 (4)

  View details for DOI 10.1002/admi.201801497

  View details for Web of Science ID 000459485500021

• Origin and annealing of deep-level defects in GaNAs grown by metalorganic vapor phase epitaxy JOURNAL OF APPLIED PHYSICS Gelczuk, L., Stokowski, H., Dabrowska-Szata, M., Kudrawiec, R. 2016; 119 (18)

  View details for DOI 10.1063/1.4949514

  View details for Web of Science ID 000377717500052

• Bi-induced acceptor level responsible for partial compensation of native free electron density in InP1-xBix dilute bismide alloys JOURNAL OF PHYSICS D-APPLIED PHYSICS Gelczuk, L., Stokowski, H., Kopaczek, J., Zhang, L., Li, Y., Wang, K., Wang, P., Wang, S., Kudrawiec, R. 2016; 49 (11)

  View details for DOI 10.1088/0022-3727/49/11/115107

  View details for Web of Science ID 000371007100010