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17 March 2023 Graded-interfaces modeling of record-performance mid and long-wave infrared quantum cascade lasers
S. Suri, B. Knipfer, T. Grange, H. Guo, J. D. Kirch, L. J. Mawst, R. A. Marsland, D. Botez
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Proceedings Volume PC12440, Novel In-Plane Semiconductor Lasers XXII; PC124400U (2023) https://doi.org/10.1117/12.2648055
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
Accurate nonequilibrium Green’s-functions simulations of record-performance 4.9 µm- and 8.3 µm-emitting QCLs, employing Photon-Induced Carrier Transport (PICT), require inclusion of graded interfaces when calculating Interface-Roughness (IFR) scattering. Matching threshold-current densities and V-I characteristics, all IFR parameters were extracted. The root-mean-square height and in-plane correlation length are found to be higher and lower, respectively, than when assuming abrupt interfaces. Abrupt-interfaces’ modeled 4.9 µm-emitting QCLs lack PICT action, which reduces the calculated maximum wall-plug efficiency, η(wp,max), value from 27% to 18.7%. Abrupt-interfaces’ modeled 8.3 µm-emitting QCLs have approximately 70% higher relative leakage-current density, which reduces the calculated η(wp,max) value from 17% to 11.7%.
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S. Suri, B. Knipfer, T. Grange, H. Guo, J. D. Kirch, L. J. Mawst, R. A. Marsland, and D. Botez "Graded-interfaces modeling of record-performance mid and long-wave infrared quantum cascade lasers", Proc. SPIE PC12440, Novel In-Plane Semiconductor Lasers XXII, PC124400U (17 March 2023); https://doi.org/10.1117/12.2648055
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KEYWORDS
Quantum cascade lasers
Infrared lasers
Infrared radiation
Long wavelength infrared
Mid-IR
Thermal modeling
Crystals
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