Controlling many-body effects in the midinfrared gain and terahertz absorption of quantum cascade laser structures
(2004) In Physical Review B (Condensed Matter and Materials Physics) 69.- Abstract
- A many-body theory based on nonequilibrium Green functions, in which transport and optics are treated on a microscopic quantum-mechanical basis, is used to compute gain and absorption in the optical and terahertz regimes in quantum cascade laser structures. The relative importance of Coulomb interactions for different intersubband transitions depends strongly on the spatial overlap of the wave functions and the specific nonequilibrium populations within the subbands. The magnitude of the Coulomb effects can be controlled by changing the operation bias.
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1360504
- author
- Pereira, Mauro F ; Lee, S.-C. and Wacker, Andreas LU
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review B (Condensed Matter and Materials Physics)
- volume
- 69
- article number
- 205310
- publisher
- American Physical Society
- external identifiers
-
- scopus:42749098468
- ISSN
- 1098-0121
- DOI
- 10.1103/PhysRevB.69.205310
- language
- English
- LU publication?
- yes
- id
- e13f3e0b-575f-4f46-abaa-aacf64ac562b (old id 1360504)
- date added to LUP
- 2016-04-04 09:44:19
- date last changed
- 2022-04-16 00:51:47
@article{e13f3e0b-575f-4f46-abaa-aacf64ac562b, abstract = {{A many-body theory based on nonequilibrium Green functions, in which transport and optics are treated on a microscopic quantum-mechanical basis, is used to compute gain and absorption in the optical and terahertz regimes in quantum cascade laser structures. The relative importance of Coulomb interactions for different intersubband transitions depends strongly on the spatial overlap of the wave functions and the specific nonequilibrium populations within the subbands. The magnitude of the Coulomb effects can be controlled by changing the operation bias.}}, author = {{Pereira, Mauro F and Lee, S.-C. and Wacker, Andreas}}, issn = {{1098-0121}}, language = {{eng}}, publisher = {{American Physical Society}}, series = {{Physical Review B (Condensed Matter and Materials Physics)}}, title = {{Controlling many-body effects in the midinfrared gain and terahertz absorption of quantum cascade laser structures}}, url = {{http://dx.doi.org/10.1103/PhysRevB.69.205310}}, doi = {{10.1103/PhysRevB.69.205310}}, volume = {{69}}, year = {{2004}}, }