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Quantum-confinement effects in InAs-InP core-shell nanowires

Zanolli, Zeila LU ; Pistol, Mats-Erik LU ; Fröberg, Linus LU and Samuelson, Lars LU (2007) In Journal of Physics: Condensed Matter 19(29).
Abstract
We report the detection of quantum confinement in single InAs-InP core shell nanowires. The wires, having an InAs core with similar to 25 nm diameter, are characterized by emission spectra in which two peaks are identified under high excitation intensity conditions. The peaks are caused by emission from the ground and excited quantized levels, due to quantum confinement in the plane perpendicular to the nanowire axis. We have identified different energy contributions in the emission spectra, related to the wurtzite structure of the wires, the strain between the wurtzite core and the shell, and the confinement energy of the InAs core. Calculations based on six-band strain-dependent k (.) p theory allow the theoretical estimation of the... (More)
We report the detection of quantum confinement in single InAs-InP core shell nanowires. The wires, having an InAs core with similar to 25 nm diameter, are characterized by emission spectra in which two peaks are identified under high excitation intensity conditions. The peaks are caused by emission from the ground and excited quantized levels, due to quantum confinement in the plane perpendicular to the nanowire axis. We have identified different energy contributions in the emission spectra, related to the wurtzite structure of the wires, the strain between the wurtzite core and the shell, and the confinement energy of the InAs core. Calculations based on six-band strain-dependent k (.) p theory allow the theoretical estimation of the confined energy states in such materials, and we found these results to be in good agreement with those from the photoluminescence studies. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Physics: Condensed Matter
volume
19
issue
29
publisher
IOP Publishing
external identifiers
  • wos:000247929700021
  • scopus:34547282643
ISSN
1361-648X
DOI
10.1088/0953-8984/19/29/295219
language
English
LU publication?
yes
id
eff1af4e-668e-4730-b03a-7e40f5cf7657 (old id 645604)
date added to LUP
2007-12-19 11:14:21
date last changed
2017-09-10 04:38:39
@article{eff1af4e-668e-4730-b03a-7e40f5cf7657,
  abstract     = {We report the detection of quantum confinement in single InAs-InP core shell nanowires. The wires, having an InAs core with similar to 25 nm diameter, are characterized by emission spectra in which two peaks are identified under high excitation intensity conditions. The peaks are caused by emission from the ground and excited quantized levels, due to quantum confinement in the plane perpendicular to the nanowire axis. We have identified different energy contributions in the emission spectra, related to the wurtzite structure of the wires, the strain between the wurtzite core and the shell, and the confinement energy of the InAs core. Calculations based on six-band strain-dependent k (.) p theory allow the theoretical estimation of the confined energy states in such materials, and we found these results to be in good agreement with those from the photoluminescence studies.},
  articleno    = {295219},
  author       = {Zanolli, Zeila and Pistol, Mats-Erik and Fröberg, Linus and Samuelson, Lars},
  issn         = {1361-648X},
  language     = {eng},
  number       = {29},
  publisher    = {IOP Publishing},
  series       = {Journal of Physics: Condensed Matter},
  title        = {Quantum-confinement effects in InAs-InP core-shell nanowires},
  url          = {http://dx.doi.org/10.1088/0953-8984/19/29/295219},
  volume       = {19},
  year         = {2007},
}