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

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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.


  • M. Franckié
  • L. Bosco
  • M. Beck
  • C. Bonzon
  • E. Mavrona
  • G. Scalari
  • A. Wacker
  • J. Faist
External organisations
  • ETH Zürich
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Article number021104
JournalApplied Physics Letters
Issue number2
Publication statusPublished - 2018 Jan 8
Publication categoryResearch

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