Split-well direct-phonon terahertz quantum cascade lasers
Author(s)
Albo, Asaf; Flores, Yuri V; Hu, Qing; Reno, John L
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© 2019 Author(s). We present a so-called "split-well direct-phonon" active region design for terahertz quantum cascade lasers (THz-QCLs). Lasers based on this scheme profit from both elimination of high-lying parasitic bound states and resonant-depopulation of the lower laser level. Negative differential resistance is observed at room temperature, which indicates that each module behaves as a clean 3-level system. We further use this design to investigate the impact of temperature on the dephasing time of GaAs/AlGaAs THz-QCLs.
Date issued
2019Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of ElectronicsJournal
Applied Physics Letters
Publisher
AIP Publishing