Characterization of intersubband devices combining a nonequilibrium many body theory with transmission spectroscopy experiments
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In this paper we apply a microscopic nonequilibrium many body Keldysh Green′s functions approach to an analysis of complex intersubband optical materials and devices. The calculated absorption/gain spectra are in very good agreement with transmission spectroscopy measurements of quantum cascade laser structures operating in the mid-infrared (midIR). The very good agreement reached between theoretical results and experimental measurements benchmarks the predictive power of our algorithms and its potential as a design tool for efficient intersubband designs.
KeywordsQuantum Cascade Laser Intersubband Transition Cancellation Effect Quantum Cascade Laser Structure Nonequilibrium Green Function
The authors acknowledge the financial support provided by the Swedish Research Council, the EU FP6 Grant No. STRP 505642 “ANSWER” and Grant No. MRTN-CT-2004–51240 “POISE”.
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