Journal
AIP ADVANCES
Volume 10, Issue 11, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/5.0015952
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Funding
- Israel Science Foundation (ISF) [1556/18]
- Bar-Ilan University
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A split-well direct phonon THz quantum cascade laser scheme supporting a clean three-level system was analyzed using nonequilibrium Green's functions. In this system, most of the electrons occupy the lower three levels, and thermally activated leakage channels are suppressed almost entirely. The simulations showed that the gain values were deeply affected by the changes in the devices' interface roughness and impurity scattering strengths. We concluded that in addition to the low oscillator strength and relatively low doping level, these are the mechanisms responsible for the temperature performance limitations of this scheme.
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