Self-assembled quantum dots in a nanowire system for quantum photonics
(2013) In Nature Materials 12(5). p.439-444- Abstract
- Quantum dots embedded within nanowires represent one of the most promising technologies for applications in quantum photonics. Whereas the top-down fabrication of such structures remains a technological challenge, their bottom-up fabrication through self-assembly is a potentially more powerful strategy. However, present approaches often yield quantum dots with large optical linewidths, making reproducibility of their physical properties difficult. We present a versatile quantum-dot-innanowire system that reproducibly self-assembles in core-shell GaAs/AlGaAs nanowires. The quantum dots form at the apex of a GaAs/AlGaAs interface, are highly stable, and can be positioned with nanometre precision relative to the nanowire centre. Unusually,... (More)
- Quantum dots embedded within nanowires represent one of the most promising technologies for applications in quantum photonics. Whereas the top-down fabrication of such structures remains a technological challenge, their bottom-up fabrication through self-assembly is a potentially more powerful strategy. However, present approaches often yield quantum dots with large optical linewidths, making reproducibility of their physical properties difficult. We present a versatile quantum-dot-innanowire system that reproducibly self-assembles in core-shell GaAs/AlGaAs nanowires. The quantum dots form at the apex of a GaAs/AlGaAs interface, are highly stable, and can be positioned with nanometre precision relative to the nanowire centre. Unusually, their emission is blue-shifted relative to the lowest energy continuum states of the GaAs core. Large-scale electronic structure calculations show that the origin of the optical transitions lies in quantum confinement due to Al-rich barriers. By emitting in the red and self-assembling on silicon substrates, these quantum dots could therefore become building blocks for solid-state lighting devices and third-generation solar cells. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3843850
- author
- organization
- publishing date
- 2013
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Materials
- volume
- 12
- issue
- 5
- pages
- 439 - 444
- publisher
- Nature Publishing Group
- external identifiers
-
- wos:000317954800015
- scopus:84876679524
- ISSN
- 1476-4660
- DOI
- 10.1038/NMAT3557
- language
- English
- LU publication?
- yes
- id
- 33f42362-ca9f-466c-9a1f-567610c46a5d (old id 3843850)
- date added to LUP
- 2016-04-01 10:20:25
- date last changed
- 2023-11-09 18:01:02
@article{33f42362-ca9f-466c-9a1f-567610c46a5d, abstract = {{Quantum dots embedded within nanowires represent one of the most promising technologies for applications in quantum photonics. Whereas the top-down fabrication of such structures remains a technological challenge, their bottom-up fabrication through self-assembly is a potentially more powerful strategy. However, present approaches often yield quantum dots with large optical linewidths, making reproducibility of their physical properties difficult. We present a versatile quantum-dot-innanowire system that reproducibly self-assembles in core-shell GaAs/AlGaAs nanowires. The quantum dots form at the apex of a GaAs/AlGaAs interface, are highly stable, and can be positioned with nanometre precision relative to the nanowire centre. Unusually, their emission is blue-shifted relative to the lowest energy continuum states of the GaAs core. Large-scale electronic structure calculations show that the origin of the optical transitions lies in quantum confinement due to Al-rich barriers. By emitting in the red and self-assembling on silicon substrates, these quantum dots could therefore become building blocks for solid-state lighting devices and third-generation solar cells.}}, author = {{Heiss, M. and Fontana, Y. and Gustafsson, Anders and Wuest, G. and Magen, C. and O'Regan, D. D. and Luo, J. W. and Ketterer, B. and Conesa-Boj, S. and Kuhlmann, A. V. and Houel, J. and Russo-Averchi, E. and Morante, J. R. and Cantoni, M. and Marzari, N. and Arbiol, J. and Zunger, A. and Warburton, R. J. and Fontcuberta i Morral, A.}}, issn = {{1476-4660}}, language = {{eng}}, number = {{5}}, pages = {{439--444}}, publisher = {{Nature Publishing Group}}, series = {{Nature Materials}}, title = {{Self-assembled quantum dots in a nanowire system for quantum photonics}}, url = {{http://dx.doi.org/10.1038/NMAT3557}}, doi = {{10.1038/NMAT3557}}, volume = {{12}}, year = {{2013}}, }