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Optically induced charge storage and current generation in InAs quantum dots

Pettersson, H; Bååth, L; Carlsson, N; Seifert, Werner LU and Samuelson, Lars LU (2002) In Physical Review B (Condensed Matter and Materials Physics) 65(7).
Abstract
We report on optically induced charge storage effects and cur-rent generation in self-assembled InAs quantum dots embedded in an InP matrix. Illumination with photons of energy higher than about 0.86 eV efficiently loads the dots with a maximum of about 1 hole/dot. The spectral response at lower photon energy is strongly enhanced at elevated temperatures. We present a detailed balance model for the dots and discuss the thermally assisted optical excitation processes pertinent to hole accumulation. We also show that these processes make the dots act as nanometer-scaled temperature-dependent current generators.
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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
65
issue
7
publisher
American Physical Society
external identifiers
  • wos:000174030900011
  • scopus:17444452789
ISSN
1098-0121
DOI
10.1103/PhysRevB.65.073304
language
English
LU publication?
yes
id
80ed4aba-699c-442f-8f68-a3321ec78810 (old id 342740)
date added to LUP
2007-11-08 15:56:07
date last changed
2017-01-01 07:16:15
@article{80ed4aba-699c-442f-8f68-a3321ec78810,
  abstract     = {We report on optically induced charge storage effects and cur-rent generation in self-assembled InAs quantum dots embedded in an InP matrix. Illumination with photons of energy higher than about 0.86 eV efficiently loads the dots with a maximum of about 1 hole/dot. The spectral response at lower photon energy is strongly enhanced at elevated temperatures. We present a detailed balance model for the dots and discuss the thermally assisted optical excitation processes pertinent to hole accumulation. We also show that these processes make the dots act as nanometer-scaled temperature-dependent current generators.},
  articleno    = {073304},
  author       = {Pettersson, H and Bååth, L and Carlsson, N and Seifert, Werner and Samuelson, Lars},
  issn         = {1098-0121},
  language     = {eng},
  number       = {7},
  publisher    = {American Physical Society},
  series       = {Physical Review B (Condensed Matter and Materials Physics)},
  title        = {Optically induced charge storage and current generation in InAs quantum dots},
  url          = {http://dx.doi.org/10.1103/PhysRevB.65.073304},
  volume       = {65},
  year         = {2002},
}