Browsing FAS Scholarly Articles by Author "Choi, Hyunyong"
Now showing items 1-4 of 4
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Femtosecond dynamics of resonant tunneling and superlattice relaxation in quantum cascade lasers
Choi, Hyunyong; Norris, Theodore B.; Gresch, Tobias; Giovannini, Marcella; Faist, Jérôme; Diehl, Laurent; Capasso, Federico (AIP Publishing, 2008-03-28) -
Gain Recovery Dynamics and Photon-Driven Transport in Quantum Cascade Lasers
Choi, Hyunyong; Diehl, Laurent; Wu, Zong-Kwei; Giovannini, Marcella; Faist, Jérôme; Capasso, Federico; Norris, Theodore B. (American Physical Society, 2008)Quantum cascade lasers are semiconductor devices based on the interplay of perpendicular transport through the heterostructure and the intracavity lasing field. We employ femtosecond time-resolved pump-probe measurements ... -
Time-Resolved Investigations of Electronic Transport Dynamics in Quantum Cascade Lasers Based on Diagonal Lasing Transition
Choi, Hyunyong; Diehl, Laurent; Wu, Zong-Kwei; Giovannini, Marcella; Faist, Jérôme; Capasso, Federico; Norris, Theodore B. (Institute of Electrical and Electronics Engineers, 2009)In this study, the nature of electronic transport in quantum cascade lasers (QCLs) has been extensively investigated using an ultrafast time-resolved, degenerate, pump-probe optical technique. Our investigations enable ... -
Ultrafast Rabi flopping and coherent pulse propagation in a quantum cascade laser
Choi, Hyunyong; Gkortsas, Vasileios-Marios; Diehl, Laurent; Bour, David; Corzine, Scott; Zhu, Jintian; Höfler, Gloria; Capasso, Federico; Kärtner, Franz X.; Norris, Theodore B. (Nature Publishing Group, 2010)Pulse propagation phenomena are central to ultrashort pulse generation and amplification in lasers1–5. In the coherent regime, the phase relationship between the pulse and the material transition is preserved, allowing ...