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arXiv · 1709.09563

Two-well quantum cascade laser optimization by non-equilibrium Green's function modelling

M. Franckié·L. Bosco·M. Beck·C. Bonzon·E. Mavrona·G. Scalari·A. Wacker·J. Faist
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Abstract

We present a two-quantum well THz intersubband laser operating up to 192 K. The structure has been optimized with a non-equilibrium Green's function model. The result of this optimization was confirmed experimentally by growing, processing and measuring a number of proposed designs. At high temperature (T>200 K), the simulations indicate that lasing fails due to a combination of electron-electron scattering, thermal backfilling, and, most importantly, re-absorption coming from broadened states.

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M. Franckié, L. Bosco, M. Beck, C. Bonzon, E. Mavrona, G. Scalari, A. Wacker, J. Faist. 2017-09-27. Two-well quantum cascade laser optimization by non-equilibrium Green's function modelling. https://doi.org/10.1063/1.5004640

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