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Optical properties of rotationally twinned InP nanowire heterostructures

Bao, Jiming; Bell, David C; Capasso, Federico; Wagner, Jakob LU ; Mårtensson, Thomas LU ; Trägårdh, Johanna LU and Samuelson, Lars LU (2008) In Nano Letters 8(3). p.836-841
Abstract
We have developed a technique so that both transmission electron microscopy and microphotoluminescence can be performed on the same semiconductor nanowire over a large range of optical power, thus allowing us to directly correlate structural and optical properties of rotationally twinned zinc blende InP nanowires. We have constructed the energy band diagram of the resulting multiquantum well heterostructure and have performed detailed quantum mechanical calculations of the electron and hole wave functions. The excitation power dependent blue-shift of the photoluminescence can be explained in terms of the predicted staggered band alignment of the rotationally twinned zinc blende/wurzite InP heterostructure and of the concomitant diagonal... (More)
We have developed a technique so that both transmission electron microscopy and microphotoluminescence can be performed on the same semiconductor nanowire over a large range of optical power, thus allowing us to directly correlate structural and optical properties of rotationally twinned zinc blende InP nanowires. We have constructed the energy band diagram of the resulting multiquantum well heterostructure and have performed detailed quantum mechanical calculations of the electron and hole wave functions. The excitation power dependent blue-shift of the photoluminescence can be explained in terms of the predicted staggered band alignment of the rotationally twinned zinc blende/wurzite InP heterostructure and of the concomitant diagonal transitions between localized electron and hole states responsible for radiative recombination. The ability of rotational twinning to introduce a heterostructure in a chemically homogeneous nanowire material and alter in a major way its optical properties opens new possibilities for band-structure engineering. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nano Letters
volume
8
issue
3
pages
836 - 841
publisher
The American Chemical Society
external identifiers
  • wos:000253947400013
  • scopus:61449125972
ISSN
1530-6992
DOI
10.1021/nl072921e
language
English
LU publication?
yes
id
e7e35448-8b91-4e50-8822-bea733e03a38 (old id 1185950)
date added to LUP
2008-09-03 11:31:08
date last changed
2017-10-22 04:13:19
@article{e7e35448-8b91-4e50-8822-bea733e03a38,
  abstract     = {We have developed a technique so that both transmission electron microscopy and microphotoluminescence can be performed on the same semiconductor nanowire over a large range of optical power, thus allowing us to directly correlate structural and optical properties of rotationally twinned zinc blende InP nanowires. We have constructed the energy band diagram of the resulting multiquantum well heterostructure and have performed detailed quantum mechanical calculations of the electron and hole wave functions. The excitation power dependent blue-shift of the photoluminescence can be explained in terms of the predicted staggered band alignment of the rotationally twinned zinc blende/wurzite InP heterostructure and of the concomitant diagonal transitions between localized electron and hole states responsible for radiative recombination. The ability of rotational twinning to introduce a heterostructure in a chemically homogeneous nanowire material and alter in a major way its optical properties opens new possibilities for band-structure engineering.},
  author       = {Bao, Jiming and Bell, David C and Capasso, Federico and Wagner, Jakob and Mårtensson, Thomas and Trägårdh, Johanna and Samuelson, Lars},
  issn         = {1530-6992},
  language     = {eng},
  number       = {3},
  pages        = {836--841},
  publisher    = {The American Chemical Society},
  series       = {Nano Letters},
  title        = {Optical properties of rotationally twinned InP nanowire heterostructures},
  url          = {http://dx.doi.org/10.1021/nl072921e},
  volume       = {8},
  year         = {2008},
}