Nature of Charge Transport in Quantum-Cascade Lasers

Rita Claudia Iotti and Fausto Rossi
Phys. Rev. Lett. 87, 146603 – Published 18 September 2001
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Abstract

The first global quantum simulation of semiconductor-based quantum-cascade lasers is presented. Our three-dimensional approach allows us to study in a purely microscopic way the current-voltage characteristics of state-of-the-art unipolar nanostructures, and therefore to answer the long-standing controversial question: Is charge transport in quantum-cascade lasers mainly coherent or incoherent? Our analysis shows that (i) quantum corrections to the semiclassical scenario are minor and (ii) inclusion of carrier-phonon and carrier-carrier scattering gives excellent agreement with experimental results.

  • Received 14 November 2000

DOI:https://doi.org/10.1103/PhysRevLett.87.146603

©2001 American Physical Society

Authors & Affiliations

Rita Claudia Iotti1,2 and Fausto Rossi1

  • 1Istituto Nazionale per la Fisica della Materia (INFM) and Dipartimento di Fisica, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy
  • 2Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy

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Vol. 87, Iss. 14 — 1 October 2001

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