Prof. Yun-Shik Lee Profile

Prof. Yun-Shik Lee

Associate Professor at Oregon State Univ

SPIE Involvement:

Author

Proceedings Article | 22 May 2015 Paper

Video rate imaging at 1.5 THz via frequency upconversion to the near-IR

Patrick Tekavec, Vladimir Kozlov, Ian McNee, Yun-Shik Lee, Konstantin Vodopyanov

Proceedings Volume 9467, 94672F (2015) https://doi.org/10.1117/12.2176843

KEYWORDS: Terahertz radiation, Upconversion, Video, Sensors, Gallium arsenide, Image filtering, Fiber lasers, Crystals, Optical filters, Optical parametric oscillators

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Proceedings Article | 21 February 2012 Paper

Terahertz spectroscopy of Ni-Ti alloy thin films

A. Jameson, J. Tomaino, M. Paul, J. Kevek, E. Minot, M. Hemphill-Johnston, M. Koretsky, Yun-Shik Lee

Proceedings Volume 8260, 82601Q (2012) https://doi.org/10.1117/12.905527

KEYWORDS: Terahertz radiation, Silicon, Thin films, Spectroscopy, Terahertz spectroscopy, Femtosecond phenomena, Crystals, Nickel, Sputter deposition, Argon

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Proceedings Article | 21 February 2012 Paper

Terahertz imaging and time-domain spectroscopy of large-area graphene on silicon

J. Tomaino, A. Jameson, J. Kevek, M. Paul, A. van der Zande, R. Barton, P. McEuen, E. Minot, Yun-Shik Lee

Proceedings Volume 8260, 82600Z (2012) https://doi.org/10.1117/12.905525

KEYWORDS: Graphene, Terahertz radiation, Silicon, Imaging spectroscopy, Image transmission, Spectroscopy, Carrier dynamics, Resistance, Millimeter wave imaging, Chemical vapor deposition

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Proceedings Article | 15 February 2012 Paper

Terahertz-induced optical modulations in quantum-well microcavity

Yun-Shik Lee, J. Tomaino, A. Jameson, G. Khitrova, H. Gibbs, A. Klettke, M. Kira, S. Koch

Proceedings Volume 8240, 824008 (2012) https://doi.org/10.1117/12.905528

KEYWORDS: Terahertz radiation, Optical microcavities, Quantum wells, Reflectivity, Modulation, Polarization, Picosecond phenomena, Semiconductors, Excitons, Optical testing

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Proceedings Article | 18 February 2010 Paper

Terahertz and optical frequency mixing in semiconductor quantum-wells

Yun-Shik Lee, A. Jameson, J. Tomaino, J. Prineas, J. Steiner, M. Kra, S. Koch

Proceedings Volume 7582, 75820Y (2010) https://doi.org/10.1117/12.841199

KEYWORDS: Terahertz radiation, Excitons, Picosecond phenomena, Transient nonlinear optics, Quantum wells, Semiconductors, Ultrafast phenomena, Polarization, Optical testing, Solids

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Proceedings Article | 14 February 2007 Paper

Coherent detection of multicycle terahertz pulses generated in periodically inverted GaAs structures

Yun-Shik Lee, W. Hurlbut, K. Vodopyanov, M. Fejer, V. Kozlov

Proceedings Volume 6455, 64550G (2007) https://doi.org/10.1117/12.699411

KEYWORDS: Terahertz radiation, Gallium arsenide, Femtosecond phenomena, Absorption, Semiconducting wafers, Frequency conversion, Crystals, Phase velocity, Spectroscopy, Michelson interferometers

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Proceedings Article | 14 February 2007 Paper

Arbitrary terahertz pulse shaping via optical rectification in fanned-out periodically-poled lithium niobate

Yun-Shik Lee, J. Danielson, N. Amer

Proceedings Volume 6455, 64550J (2007) https://doi.org/10.1117/12.699409

KEYWORDS: Terahertz radiation, Crystals, Pulse shaping, Mirrors, Linear filtering, Spherical lenses, Optical filters, Spectral resolution, Nonlinear crystals, Frequency conversion

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Proceedings Article | 17 October 2006 Paper

Tunable THz source based on frequency conversion in quasi-phase-matched GaAs

K. Vodopyanov, J. Schaar, M. Fejer, X. Yu, J. Harris, Y.-S. Lee, V. Kozlov, G. Imeshev, M. Fermann, D. Bliss, C. Lynch

Proceedings Volume 6386, 63860T (2006) https://doi.org/10.1117/12.692053

KEYWORDS: Terahertz radiation, Gallium arsenide, Optical parametric oscillators, Picosecond phenomena, Frequency conversion, Crystals, Mirrors, Femtosecond phenomena, Absorption, Transient nonlinear optics

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Proceedings Article | 7 March 2006 Paper

Generation of multi-cycle THz-pulses via optical rectification in periodically inverted GaAs

Yun-Shik Lee, K. Vodopyanov, W. Hurlbut, J. Danielson, V. Kozlov, D. Bliss, M. Fejer

Proceedings Volume 6120, 612003 (2006) https://doi.org/10.1117/12.644438

KEYWORDS: Terahertz radiation, Gallium arsenide, Crystals, Nonlinear crystals, Frequency conversion, Absorption, Femtosecond phenomena, Water, Polarization, Michelson interferometers

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Proceedings Article | 24 November 2005 Paper

Generation and manipulation of multi-cycle terahertz pulses via optical rectification in poled lithium niobate

Yun-Shik Lee, N. Amer, W. Hurlbut, B. Norton, J. Danielson

Proceedings Volume 6002, 600211 (2005) https://doi.org/10.1117/12.630019

KEYWORDS: Terahertz radiation, Crystals, Nonlinear crystals, Pulse shaping, Frequency conversion, Lithium niobate, Picosecond phenomena, Femtosecond phenomena, Absorption, Molecules

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We demonstrate control of terahertz (THz) waves developing novel devices in the THz regime: THz pulse shapers. THz technology is a relatively unexplored subject, yet the importance of THz wave manipulation cannot be emphasized enough considering its potential application to THz imaging systems, ultrafast optical signal processing, ultrahigh-speed computing, quantum information science, nanotechnology, and chemical reaction dynamics among other areas. THz time-domain spectroscopy (THz-TDS) can assess the performance of the THz pulse shapers monitoring time-dependent THz wave propagation. THz-TDS permits precise measurements not only of the amplitude but also of the phase of THz waves, thus a comprehensive assessment of the THz devices can be achieved. The phase sensitivity is also vital to many applications such as high-contrast THz imaging and quantum control of semiconductor nanostructures. We develop arbitrary THz pulse generators synthesizing THz waveforms via optical rectification in pre-engineered domain structures of poled nonlinear crystals using femtosecond lasers. The terahertz waveforms coincide with the crystal domain structures. The one dimensional nonlinear wave equation simulates the experimental results with a good qualitative agreement. The ratio of the domain length to the optical pulse length in the crystal turns out to be the crucial limiting factor to generating optimum terahertz fields and preventing waveform distortion. Optical pulse shaping techniques is integrated into the THz pulse generators to extend the scope of THz pulse shaping control. Continuously tunable narrow-band THz pulses are generated in a fanned-out periodically-poled lithium niobate crystal. We measure the free induction decay of rotational transitions in gas-phase HCl molecules using the narrow-band THz pulses. The shape of the multi-cycle THz pulses is controlled by adjusting the relative time delay and intensity between the two optical pulses.

Proceedings Article | 30 April 1998 Paper

New directions in surface spectroscopy enabled by ultrafast lasers

P. Wilson, Yun-Shik Lee, Y. Jiang, D. Lim, R. Kempf, R. Bungener, X. Hu, Jerry Dadap, Mark Anderson, M. ter Beek, Z. Xu, N. Russell, John Ekerdt, P. Parkinson, E. Mishina, Oleg Aktsipetrov, Michael Downer

Proceedings Volume 3272, (1998) https://doi.org/10.1117/12.307114

KEYWORDS: Second-harmonic generation, Spectroscopy, Interfaces, Polarization, Silicon, Hydrogen, Spectroscopes, Femtosecond phenomena, Harmonic generation, Ultrafast lasers

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Showing 5 of 11 publications

Conference Committee Involvement (9)

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XV

15 February 2016 | San Francisco, California, United States

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIV

9 February 2015 | San Francisco, California, United States

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XIII

4 February 2014 | San Francisco, California, United States

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XII

5 February 2013 | San Francisco, California, United States

Nonlinear Frequency Generation and Conversion: Materials, Devices, and Applications XI

24 January 2012 | San Francisco, California, United States

Showing 5 of 9 Conference Committees

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