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Atomically sharp, crystal phase defined GaAs quantum dots

Geijselaers, Irene LU ; Vainorius, Neimantas LU ; Lehmann, Sebastian LU ; Pryor, Craig E. ; Dick, Kimberly LU and Pistol, Mats-Erik LU (2021) In Applied Physics Letters 119(26).
Abstract
Crystal phase defined heterostructures, or polytype heterostructures, are atomically sharp with no intermixing, which makes them ideal contenders for a wide number of applications. Although polytype quantum dots have shown promising results as single photon sources, a high degree of control on the dimensions and number of polytype quantum dots is necessary before any application can be developed.
In this work we show results from optical characterization of highly controlled wz-zb GaAs quantum dots with sharp photoluminescence signal and a strong indication of 0D density of states. One band effective mass calculations show good agreement with the measured data. Radially confined nanowires with a single wz-zb GaAs interface also show... (More)
Crystal phase defined heterostructures, or polytype heterostructures, are atomically sharp with no intermixing, which makes them ideal contenders for a wide number of applications. Although polytype quantum dots have shown promising results as single photon sources, a high degree of control on the dimensions and number of polytype quantum dots is necessary before any application can be developed.
In this work we show results from optical characterization of highly controlled wz-zb GaAs quantum dots with sharp photoluminescence signal and a strong indication of 0D density of states. One band effective mass calculations show good agreement with the measured data. Radially confined nanowires with a single wz-zb GaAs interface also show sharp photoluminescence signal and a 0D density of states. This indicates the existence of quantum dot like states in the triangular wells formed at the wz-zb GaAs interface. These results show the potential of polytype quantum dots for physics and optics applications. (Less)
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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
crystal phase quantum dot, wurtzite, GaAs, type-II, photoluminescence
in
Applied Physics Letters
volume
119
issue
26
pages
5 pages
publisher
American Institute of Physics (AIP)
external identifiers
  • scopus:85122262161
ISSN
0003-6951
DOI
10.1063/5.0072151
language
English
LU publication?
yes
id
4c70c449-55fe-4f0a-aa9b-6aab73834adc
date added to LUP
2021-09-28 14:54:56
date last changed
2023-11-08 19:58:35
@article{4c70c449-55fe-4f0a-aa9b-6aab73834adc,
  abstract     = {{Crystal phase defined heterostructures, or polytype heterostructures, are atomically sharp with no intermixing, which makes them ideal contenders for a wide number of applications. Although polytype quantum dots have shown promising results as single photon sources, a high degree of control on the dimensions and number of polytype quantum dots is necessary before any application can be developed.<br/>In this work we show results from optical characterization of highly controlled wz-zb GaAs quantum dots with sharp photoluminescence signal and a strong indication of 0D density of states. One band effective mass calculations show good agreement with the measured data. Radially confined nanowires with a single wz-zb GaAs interface also show sharp photoluminescence signal and a 0D density of states. This indicates the existence of quantum dot like states in the triangular wells formed at the wz-zb GaAs interface. These results show the potential of polytype quantum dots for physics and optics applications.}},
  author       = {{Geijselaers, Irene and Vainorius, Neimantas and Lehmann, Sebastian and Pryor, Craig E. and Dick, Kimberly and Pistol, Mats-Erik}},
  issn         = {{0003-6951}},
  keywords     = {{crystal phase quantum dot; wurtzite; GaAs; type-II; photoluminescence}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{26}},
  publisher    = {{American Institute of Physics (AIP)}},
  series       = {{Applied Physics Letters}},
  title        = {{Atomically sharp, crystal phase defined GaAs quantum dots}},
  url          = {{http://dx.doi.org/10.1063/5.0072151}},
  doi          = {{10.1063/5.0072151}},
  volume       = {{119}},
  year         = {{2021}},
}