Journal
APPLIED PHYSICS LETTERS
Volume 114, Issue 19, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5089854
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Funding
- Israel Science Foundation (ISF) [1556/18]
- Bar-Ilan University
- Research Fellowship Program of the German Research Foundation, DFG [FL945/1-1]
- NSF
- NASA
- Israel MoD
- ISF
- Honeywell International, Inc.
- U.S. Department of Energy's National Nuclear Security Administration [DE-NA-0003525]
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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.
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