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- W3081238045 abstract "We report on the stimulated emission (SE) from HgTe/CdHgTe quantum well (QW) heterostructures up to 240 K at 3.7 μm wavelength. Based on the temperature dependence of the SE threshold, a total Auger recombination (AR) coefficient of 10−27 cm6/s has been deduced for HgTe/CdHgTe QWs, which is much lower than that for bulk HgCdTe with the same bandgap and indicates suppression of (threshold) AR processes due to the symmetry of carrier dispersion curves. We demonstrate that QW-specific, non-threshold AR contributes strongly to the temperature quenching of laser action from HgTe/CdHgTe QWs. We expect, however, that the above processes may be partially suppressed via introduction of wide-gap CdHgTe barrier layers with a [Cd] fraction of 80% or higher. In this case, lasing up to at least 270 K at 3.7 μm wavelength seems feasible." @default.
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- W3081238045 date "2020-08-24" @default.
- W3081238045 modified "2023-10-17" @default.
- W3081238045 title "Temperature limitations for stimulated emission in 3–4 <b> <i>μ</i> </b>m range due to threshold and non-threshold Auger recombination in HgTe/CdHgTe quantum wells" @default.
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- W3081238045 doi "https://doi.org/10.1063/5.0020218" @default.
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