Free-carrier absorption in quantum cascade structures
(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.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2390960
- author
- Carosella, F. ; Ndebeka-Bandou, C. ; Ferreira, R. ; Dupont, E. ; Unterrainer, K. ; Strasser, G. ; Wacker, Andreas LU and Bastard, G.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 85
- issue
- 8
- article number
- 085310
- 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
- 2016-04-01 14:11:27
- date last changed
- 2023-11-13 03:59:29
@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.}}, 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 = {{https://lup.lub.lu.se/search/files/3835330/2969491.pdf}}, doi = {{10.1103/PhysRevB.85.085310}}, volume = {{85}}, year = {{2012}}, }