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Free-carrier absorption in quantum cascade structures

Carosella, F.; Ndebeka-Bandou, C.; Ferreira, R.; Dupont, E.; Unterrainer, K.; Strasser, G.; Wacker, Andreas LU and Bastard, G. (2012) In Physical Review B (Condensed Matter and Materials Physics) 85(8).
Abstract
We show that the free-carrier absorption in quantum cascade lasers (QCLs) is very small and radically different from the classical Drude result due to the orthogonality between the direction of the carrier free motion and the electric field of the laser emission. A quantum mechanical calculation of the free-carrier absorption and intersubband oblique absorption induced by interface defects, Coulombic impurities, and optical phonon absorption/emission is presented for QCLs with a double-quantum-well design. The interaction between the electrons and the optical phonons dominates at room temperature.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
85
issue
8
publisher
American Physical Society
external identifiers
  • wos:000300566900007
  • scopus:84857699087
ISSN
1098-0121
DOI
10.1103/PhysRevB.85.085310
language
English
LU publication?
yes
id
f079f946-54c0-404d-ac21-8e61ccad7ace (old id 2390960)
date added to LUP
2012-03-29 07:38:38
date last changed
2017-06-11 04:13:08
@article{f079f946-54c0-404d-ac21-8e61ccad7ace,
  abstract     = {We show that the free-carrier absorption in quantum cascade lasers (QCLs) is very small and radically different from the classical Drude result due to the orthogonality between the direction of the carrier free motion and the electric field of the laser emission. A quantum mechanical calculation of the free-carrier absorption and intersubband oblique absorption induced by interface defects, Coulombic impurities, and optical phonon absorption/emission is presented for QCLs with a double-quantum-well design. The interaction between the electrons and the optical phonons dominates at room temperature.},
  articleno    = {085310},
  author       = {Carosella, F. and Ndebeka-Bandou, C. and Ferreira, R. and Dupont, E. and Unterrainer, K. and Strasser, G. and Wacker, Andreas and Bastard, G.},
  issn         = {1098-0121},
  language     = {eng},
  number       = {8},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Free-carrier absorption in quantum cascade structures},
  url          = {http://dx.doi.org/10.1103/PhysRevB.85.085310},
  volume       = {85},
  year         = {2012},
}