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- W2955366532 abstract "Abstract Operating at high temperatures in the range of thermoelectric coolers is essential for terahertz quantum cascade lasers to real applications. The use of scattering-assisted injection scheme enables an increase in operating temperature. This concept, however, has not been implemented in a short-period structure consisting of two quantum wells. In this work, based on non-equilibrium Green’s function calculations, it emphasizes on the current leakage and parasitic absorption via high-energy states as fundamental limitations in this scheme with short-period. A new design concept employing asymmetric wells composition is proposed to suppress these limitations. A peak gain of 40 cm −1 at 230 K is predicted in the GaAs/AlGaAs semiconductor material system with an emission frequency of 3.5 THz." @default.
- W2955366532 created "2019-07-12" @default.
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- W2955366532 date "2019-07-01" @default.
- W2955366532 modified "2023-09-24" @default.
- W2955366532 title "Short-period scattering-assisted terahertz quantum cascade lasers operating at high temperatures" @default.
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- W2955366532 doi "https://doi.org/10.1038/s41598-019-45957-8" @default.
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