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Zero-phonon line broadening and satellite peaks in nanowire quantum dots: The role of piezoelectric coupling

Weber, Carsten LU ; Lindwall, Greta and Wacker, Andreas LU (2009) In Physica Status Solidi. B: Basic Research 246(2). p.337-341
Abstract
We investigate the influence of the one-dimensional character of the phonon modes in a catalytically grown GaAs nanowire on the absorption spectrum of an embedded quantum dot, focusing on the on the contribution from the piezoelectric coupling. In general, the reduced dimensionally of the phonons leads to spectral side peaks and a zero-phonon line broadening due to the energetically lowest (acoustic) phonon mode. While the deformation potential predominantly couples to radial modes, the piezoelectric interaction can also couple strongly to modes of axial character, leading to additional absorption features. The contribution of the piezoelectric coupling to the zero-phonon line is negligible. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA,... (More)
We investigate the influence of the one-dimensional character of the phonon modes in a catalytically grown GaAs nanowire on the absorption spectrum of an embedded quantum dot, focusing on the on the contribution from the piezoelectric coupling. In general, the reduced dimensionally of the phonons leads to spectral side peaks and a zero-phonon line broadening due to the energetically lowest (acoustic) phonon mode. While the deformation potential predominantly couples to radial modes, the piezoelectric interaction can also couple strongly to modes of axial character, leading to additional absorption features. The contribution of the piezoelectric coupling to the zero-phonon line is negligible. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physica Status Solidi. B: Basic Research
volume
246
issue
2
pages
337 - 341
publisher
John Wiley & Sons
external identifiers
  • wos:000263515400016
  • scopus:59449108019
ISSN
0370-1972
DOI
10.1002/pssb.200880324
language
English
LU publication?
yes
id
50827ad1-a950-448d-a5e9-47281434f632 (old id 1372087)
date added to LUP
2009-05-08 17:35:32
date last changed
2017-01-01 06:01:16
@article{50827ad1-a950-448d-a5e9-47281434f632,
  abstract     = {We investigate the influence of the one-dimensional character of the phonon modes in a catalytically grown GaAs nanowire on the absorption spectrum of an embedded quantum dot, focusing on the on the contribution from the piezoelectric coupling. In general, the reduced dimensionally of the phonons leads to spectral side peaks and a zero-phonon line broadening due to the energetically lowest (acoustic) phonon mode. While the deformation potential predominantly couples to radial modes, the piezoelectric interaction can also couple strongly to modes of axial character, leading to additional absorption features. The contribution of the piezoelectric coupling to the zero-phonon line is negligible. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim},
  author       = {Weber, Carsten and Lindwall, Greta and Wacker, Andreas},
  issn         = {0370-1972},
  language     = {eng},
  number       = {2},
  pages        = {337--341},
  publisher    = {John Wiley & Sons},
  series       = {Physica Status Solidi. B: Basic Research},
  title        = {Zero-phonon line broadening and satellite peaks in nanowire quantum dots: The role of piezoelectric coupling},
  url          = {http://dx.doi.org/10.1002/pssb.200880324},
  volume       = {246},
  year         = {2009},
}