Advanced

Unraveling of free-carrier absorption for terahertz radiation in heterostructures

Wacker, Andreas LU ; Bastard, Gerald; Carosella, Francesca; Ferreira, Robson and Dupont, Emmanuel (2011) In Physical Review B (Condensed Matter and Materials Physics) 84(20).
Abstract
The relation between free-carrier absorption and intersubband transitions in semiconductor heterostructures is resolved by comparing a sequence of structures. Our numerical and analytical results show how free-carrier absorption evolves from the intersubband transitions in the limit of infinite number of wells with vanishing barrier width. It is explicitly shown that the integral of the absorption over frequency matches the value obtained by he f-sum rule. This shows that a proper treatment of intersubband transitions is fully sufficient to simulate the entire electronic absorption in heterostructure THz devices.
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review B (Condensed Matter and Materials Physics)
volume
84
issue
20
publisher
American Physical Society
external identifiers
  • wos:000297106600009
  • scopus:82755191621
ISSN
1098-0121
DOI
10.1103/PhysRevB.84.205319
language
English
LU publication?
yes
id
b2452db5-30c5-4539-a194-3f50f6d1ae4a (old id 2252575)
date added to LUP
2011-12-22 10:54:10
date last changed
2017-11-05 04:09:03
@article{b2452db5-30c5-4539-a194-3f50f6d1ae4a,
  abstract     = {The relation between free-carrier absorption and intersubband transitions in semiconductor heterostructures is resolved by comparing a sequence of structures. Our numerical and analytical results show how free-carrier absorption evolves from the intersubband transitions in the limit of infinite number of wells with vanishing barrier width. It is explicitly shown that the integral of the absorption over frequency matches the value obtained by he f-sum rule. This shows that a proper treatment of intersubband transitions is fully sufficient to simulate the entire electronic absorption in heterostructure THz devices.},
  articleno    = {205319},
  author       = {Wacker, Andreas and Bastard, Gerald and Carosella, Francesca and Ferreira, Robson and Dupont, Emmanuel},
  issn         = {1098-0121},
  language     = {eng},
  number       = {20},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Unraveling of free-carrier absorption for terahertz radiation in heterostructures},
  url          = {http://dx.doi.org/10.1103/PhysRevB.84.205319},
  volume       = {84},
  year         = {2011},
}