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We have investigated non-uniformity of the lateral current density and lateral hole burning in Quantum Cascaded lasers, e.g., the current density in the mode center is 1.8 times that in the edge region.
We analyze the temperature dependence of the transparency current density in mid-infrared quantum cascade lasers and assess its contribution to measured threshold current density for a laser with low voltage defect.
We present electroluminescence from ZnCdSe/ZnCdMgSe Quantum Cascade structures, with 3 times higher luminescence efficiency, 30% narrower electroluminescence linewidths than our first demonstration. The measured turn-on voltage matches with the calculated value.
We use a density-matrix framework to evaluate the wallplug efficiency of mid-infrared quantum cascade lasers. We assess the limitations to maximum current and internal efficiency, imposed by injection coupling and current leakage, respectively.
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