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5 March 2021 Atomic-scale modeling of interface roughness scattering in quantum cascade lasers
Thomas Grange, Samik Mukherjee, Giovanni Capellini, Michele Montanari, Luca Persichetti, Luciana Di Gaspare, Stefan Birner, Anis Attiaoui, Oussama Moutanabbir, Michele Virgilio, Monica De Seta
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Proceedings Volume 11705, Novel In-Plane Semiconductor Lasers XX; 117050X (2021) https://doi.org/10.1117/12.2585205
Event: SPIE OPTO, 2021, Online Only
Abstract
The theory of interface roughness scattering is well established in the case of idealized abrupt interfaces. Here we generalize this theory for finite interfacial widths. Experimental findings for Ge/GeSi interfaces show that the interface roughness can be correlated along the growth directions at length scales smaller than the interfacial width. This feature is included in a generalized theory of interface roughness scattering, accounting for correlations along both in-plane and out-of-plane directions. This model is included in a nonequilibrium Green’s functions simulator, allowing to assess the impact of interface roughness on the performances of quantum cascade lasers.
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Thomas Grange, Samik Mukherjee, Giovanni Capellini, Michele Montanari, Luca Persichetti, Luciana Di Gaspare, Stefan Birner, Anis Attiaoui, Oussama Moutanabbir, Michele Virgilio, and Monica De Seta "Atomic-scale modeling of interface roughness scattering in quantum cascade lasers", Proc. SPIE 11705, Novel In-Plane Semiconductor Lasers XX, 117050X (5 March 2021); https://doi.org/10.1117/12.2585205
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KEYWORDS
Laser scattering
Scattering
Quantum cascade lasers
Optical simulations
Performance modeling
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