Influence of interface roughness in quantum cascade lasers

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

We use a numerical model based on non-equilibrium Green's functions to investigate the influence of interface roughness (IFR) scattering in terahertz quantum cascade lasers. We confirm that IFR is an important phenomenon that affects both current and gain. The simulations indicate that IFR causes a leakage current that transfers electrons from the upper to the lower laser state. In certain cases, this current can greatly reduce gain. In addition, individual interfaces and their impact on the renormalized single particle energies are studied and shown to give both blue-and red-shifts of the gain spectrum. (C) 2015 AIP Publishing LLC.

Detaljer

Författare
Enheter & grupper
Externa organisationer
  • Lund University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Atom- och molekylfysik och optik
Originalspråkengelska
Artikelnummer114501
TidskriftJournal of Applied Physics
Volym118
Utgåva nummer11
StatusPublished - 2015
PublikationskategoriForskning
Peer review utfördJa

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Projekt: AvhandlingIndividuellt forskningsprojekt

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