Two-well quantum cascade laser optimization by non-equilibrium Green's function modelling
FranckiƩ, M.; Bosco, L.; Beck, M.; Bonzon, C., et al. (2018-01-08). Two-well quantum cascade laser optimization by non-equilibrium Green's function modelling. Applied Physics Letters, 112, (2)
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Published
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English
Authors:
FranckiƩ, M.
;
Bosco, L.
;
Beck, M.
;
Bonzon, C.
, et al.
Department:
Mathematical Physics
NanoLund: Centre for Nanoscience
Project:
Quantum Cascade Lasers beyond general paradigms
Abstract:
We present a two-quantum well THz intersubband laser operating up to 192 K. The structure has been optimized using 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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