Karun Vijayraghavan
Karun Vijayraghavan
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Broadly tunable terahertz generation in mid-infrared quantum cascade lasers
K Vijayraghavan, Y Jiang, M Jang, A Jiang, K Choutagunta, A Vizbaras, ...
Nature communications 4 (1), 1-7, 2013
1822013
Terahertz sources based on Čerenkov difference-frequency generation in quantum cascade lasers
K Vijayraghavan, RW Adams, A Vizbaras, M Jang, C Grasse, G Boehm, ...
Applied Physics Letters 100 (25), 251104, 2012
1142012
Broadly tunable monolithic room-temperature terahertz quantum cascade laser sources
S Jung, A Jiang, Y Jiang, K Vijayraghavan, X Wang, M Troccoli, MA Belkin
Nature communications 5 (1), 1-7, 2014
812014
External cavity terahertz quantum cascade laser sources based on intra-cavity frequency mixing with 1.2–5.9 THz tuning range
Y Jiang, K Vijayraghavan, S Jung, F Demmerle, G Boehm, MC Amann, ...
Journal of Optics 16 (9), 094002, 2014
592014
Influence of the substrate misorientation on the properties of N-polar InGaN/GaN and AlGaN/GaN heterostructures
S Keller, CS Suh, NA Fichtenbaum, M Furukawa, R Chu, Z Chen, ...
Journal of Applied Physics 104 (9), 093510, 2008
532008
Spectroscopic study of terahertz generation in mid-infrared quantum cascade lasers
Y Jiang, K Vijayraghavan, S Jung, A Jiang, JH Kim, F Demmerle, ...
Scientific reports 6 (1), 1-9, 2016
312016
GaAs/Al0. 15Ga0. 85As terahertz quantum cascade lasers with double-phonon resonant depopulation operating up to 172 K
RW Adams, K Vijayraghavan, QJ Wang, J Fan, F Capasso, SP Khanna, ...
Applied Physics Letters 97 (13), 131111, 2010
312010
Improved terahertz quantum cascade laser with variable height barriers
A Matyas, R Chashmahcharagh, I Kovacs, P Lugli, K Vijayraghavan, ...
Journal of Applied Physics 111 (10), 103106, 2012
242012
Terahertz difference-frequency quantum cascade laser sources on silicon
S Jung, JH Kim, Y Jiang, K Vijayraghavan, MA Belkin
Optica 4 (1), 38-43, 2017
222017
Experimental investigation of terahertz quantum cascade laser with variable barrier heights
A Jiang, A Matyas, K Vijayraghavan, C Jirauschek, ZR Wasilewski, ...
Journal of Applied Physics 115 (16), 163103, 2014
222014
Widely tunable terahertz source based on intra-cavity frequency mixing in quantum cascade laser arrays
A Jiang, S Jung, Y Jiang, K Vijayraghavan, JH Kim, MA Belkin
Applied Physics Letters 106 (26), 261107, 2015
172015
THz Difference-Frequency Generation in MOVPE-Grown Quantum Cascade Lasers
K Vijayraghavan, M Jang, A Jiang, X Wang, M Troccoli, MA Belkin
Photonics Technology Letters, IEEE 26 (4), 391 - 394, 2014
142014
Recent progress in widely tunable single-mode room temperature terahertz quantum cascade laser sources
S Jung, Y Jiang, K Vijayraghavan, A Jiang, F Demmerle, G Boehm, ...
IEEE Journal of Selected Topics in Quantum Electronics 21 (6), 134-143, 2015
122015
Room-temperature 3.5 THz sources based on nonlinear frequency mixing in quantum cascade lasers
K Vijayraghavan, M Jang, A Jiang, X Wang, M Troccoli, MA Belkin
IEEE Photon. Technol. Lett 26, 391-394, 2013
52013
Generating terahertz frequency combs from quantum cascade lasers using nonlinear frequency mixing
MA Belkin, K Vijayraghavan, S Jung
US Patent 9,509,123, 2016
42016
External cavity system generating broadly tunable terahertz radiation in mid-infrared quantum cascade lasers
M Belkin, K Vijayraghavan, Y Jiang
US Patent App. 14/699,301, 2015
42015
Monolithic tunable terahertz radiation source using nonlinear frequency mixing in quantum cascade lasers
M Belkin, S Jung, K Vijayraghavan
US Patent App. 15/116,823, 2016
32016
Optical scattering measurements of random anti-reflective nanostructured surfaces in the mid-and long-wave IR
DA Gonzalez, J Meza-Galvan, D Sharp, K Vijayraghavan, MK Poutous
Photonic and Phononic Properties of Engineered Nanostructures X 11289, 112891Q, 2020
22020
Bi-Directional Scatter and Single-Surface Reflectivity of Random Anti-Reflective Nanostructured Surfaces
DA Gonzalez, J Meza-Galvan, D Sharp, K Vijayraghavan, MK Poutous
2019 IEEE 16th International Conference on Smart Cities: Improving Quality …, 2019
22019
Broadly tunable external cavity terahertz source from 1.2∼ 5.9 THz
Y Jiang, K Vijayraghavan, S Jung, F Demmerle, G Boehm, MC Amann, ...
2014 39th International Conference on Infrared, Millimeter, and Terahertz …, 2014
22014
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