Prof. Sushil Kumar Profile

Prof. Sushil Kumar

Associate Professor at Lehigh Univ

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Author

Publications (12)

Proceedings Article | 9 March 2022 Presentation

Surface-emitting terahertz lasers with watt-level output power and electrical tunability

Sushil Kumar

Proceedings Volume PC12021, PC120210E (2022) https://doi.org/10.1117/12.2612425

KEYWORDS: Quantum cascade lasers, Mode locking, Terahertz radiation, Optical microcavities, Laser development, Bragg gratings

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Proceedings Article | 20 February 2017 Presentation + Paper

Terahertz plasmonic lasers with narrow beams and large tunability

Yuan Jin, Chongzhao Wu, John Reno, Sushil Kumar

Proceedings Volume 10123, 1012312 (2017) https://doi.org/10.1117/12.2253676

KEYWORDS: Quantum cascade lasers, Plasmonics, Laser resonators, Wavefronts, Terahertz sources, Distributed feedback laser diodes, Plasmonic waveguides, Tunable lasers, Spiral phase plates, Terahertz radiation, Metals, Antennas, Cladding, Diffraction gratings, Wave propagation, Phased arrays

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Proceedings Article | 15 October 2012 Paper

Operation of terahertz quantum cascade lasers above 160 K covering a frequency range of 2-4 THz

Sushil Kumar

Proceedings Volume 8496, 849603 (2012) https://doi.org/10.1117/12.929760

KEYWORDS: Quantum cascade lasers, Terahertz radiation, Scattering, Electrons, Laser scattering, Phonons, Pulsed laser operation, Continuous wave operation, Nonlinear optics, Magnetism

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Proceedings Article | 17 February 2011 Paper

High-temperature performance and broad continuous tunability of terahertz quantum-cascade lasers

Sushil Kumar, Qi Qin, Chun Chan, Qing Hu, John Reno

Proceedings Volume 7953, 79530O (2011) https://doi.org/10.1117/12.875686

KEYWORDS: Quantum cascade lasers, Terahertz radiation, Waveguides, Semiconductor lasers, Laser scattering, Scattering, Silicon, Laser applications, Spectroscopy, Active optics

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Proceedings Article | 17 February 2011 Paper

The temperature dependence of key electro-optical characteristics for mid-infrared emitting quantum cascade lasers

Dan Botez, Jae Cheol Shin, Sushil Kumar, Jeremy Kirch, Chun-Chieh Chang, Luke Mawst, Igor Vurgaftman, Jerry Meyer, Alfredo Bismuto, Borislav Hinkov, Jerome Faist

Proceedings Volume 7953, 79530N (2011) https://doi.org/10.1117/12.874197

KEYWORDS: Quantum cascade lasers, Quantum wells, Quantum efficiency, Mid-IR, Heatsinks, Scattering, Electro optics, External quantum efficiency, Continuous wave operation

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SPIE Journal Paper | 1 November 2010 Open Access

Electron leakage and its suppression via deep-well structures in 4.5- to 5.0-µm-emitting quantum cascade lasers

Dan Botez, Jae Cheol Shin, Sushil Kumar, Luke Mawst, Igor Vurgaftman, Jerry Meyer

OE, Vol. 49, Issue 11, 111108, (November 2010) https://doi.org/10.1117/12.10.1117/1.3509368

KEYWORDS: Quantum cascade lasers, Scattering, Quantum efficiency, Quantum wells, Heatsinks, Temperature metrology, Picosecond phenomena, Optical engineering, Continuous wave operation

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Proceedings Article | 15 July 2010 Paper

Heterodyne gas cell measurements at 2.9 THz using a quantum cascade laser as local oscillator

Y. Ren, J. R. Gao, J. N. Hovenier, R. Higgins, W. Zhang, A. Bell, B. Klein, T. Klapwijk, S. C. Shi, T.-Y. Kao, S. Kumar, Q. Hu, J. Reno

Proceedings Volume 7741, 774118 (2010) https://doi.org/10.1117/12.857658

KEYWORDS: Quantum cascade lasers, Terahertz radiation, Heterodyning, Receivers, Oscillators, Temperature metrology, Spectroscopy, Spectrometers, Astronomy, Spectroscopes

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Proceedings Article | 12 February 2010 Paper

Suppression of carrier leakage in 4.8 μm - emitting quantum cascade lasers

D. Botez, J. C. Shin, L. Mawst, I. Vurgaftman, J. Meyer, S. Kumar

Proceedings Volume 7616, 76160N (2010) https://doi.org/10.1117/12.842593

KEYWORDS: Quantum cascade lasers, Scattering, Heatsinks, Temperature metrology, Quantum wells, Quantum efficiency, Picosecond phenomena, Electronics, Continuous wave operation

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Proceedings Article | 29 January 2008 Paper

High-temperature and high-power operation of terahertz quantum-cascade lasers

Sushil Kumar, Alan Lee, Qi Qin, Benjamin Williams, Qing Hu, John Reno

Proceedings Volume 6909, 69090I (2008) https://doi.org/10.1117/12.768298

KEYWORDS: Waveguides, Quantum cascade lasers, Terahertz radiation, Reflectivity, Pulsed laser operation, Gallium arsenide, Mirrors, Wave propagation, Radio propagation, Semiconducting wafers

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Proceedings Article | 8 February 2007 Paper

High-temperature and high-power terahertz quantum-cascade lasers

Benjamin Williams, Qi Qin, Sushil Kumar, Qing Hu, John Reno

Proceedings Volume 6485, 64850M (2007) https://doi.org/10.1117/12.714207

KEYWORDS: Terahertz radiation, Quantum cascade lasers, Waveguides, Phonons, Electrons, Temperature metrology, Continuous wave operation, Semiconducting wafers, Imaging spectroscopy

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Proceedings Article | 1 April 2005 Paper

Terahertz quantum cascade lasers with metal-metal waveguides

Benjamin Williams, Stephen Kohen, Sushil Kumar, Qing Hu, John Reno

Proceedings Volume 5738, (2005) https://doi.org/10.1117/12.597122

KEYWORDS: Waveguides, Terahertz radiation, Quantum cascade lasers, Reflectivity, Wafer bonding, Metals, Semiconducting wafers, Continuous wave operation, Mirrors, Resistance

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Proceedings Article | 11 May 2004 Paper

Terahertz quantum cascade lasers using resonant-phonon depopulation and metal-metal waveguides

Benjamin Williams, Sushil Kumar, Hans Callebaut, Stephen Kohen, Qing Hu, John Reno

Proceedings Volume 5365, (2004) https://doi.org/10.1117/12.530087

KEYWORDS: Waveguides, Terahertz radiation, Quantum cascade lasers, Continuous wave operation, Resistance, Gallium arsenide, Temperature metrology, Phonons, Picosecond phenomena

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Showing 5 of 12 publications

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