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Self-assembled quan...
Self-assembled quantum dots in a nanowire system for quantum photonics
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Heiss, M. (author)
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Fontana, Y. (author)
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- Gustafsson, Anders (author)
- Lund University,Lunds universitet,Fasta tillståndets fysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Solid State Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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Wuest, G. (author)
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Magen, C. (author)
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O'Regan, D. D. (author)
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Luo, J. W. (author)
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Ketterer, B. (author)
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Conesa-Boj, S. (author)
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Kuhlmann, A. V. (author)
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Houel, J. (author)
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Russo-Averchi, E. (author)
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Morante, J. R. (author)
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Cantoni, M. (author)
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Marzari, N. (author)
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Arbiol, J. (author)
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Zunger, A. (author)
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Warburton, R. J. (author)
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Fontcuberta i Morral, A. (author)
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(creator_code:org_t)
- 2013
- 2013
- English.
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In: Nature Materials. - 1476-4660. ; 12:5, s. 439-444
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Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- art (subject category)
- ref (subject category)
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- By the author/editor
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Heiss, M.
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Fontana, Y.
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Gustafsson, Ande ...
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Wuest, G.
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Magen, C.
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O'Regan, D. D.
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show more...
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Luo, J. W.
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Ketterer, B.
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Conesa-Boj, S.
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Kuhlmann, A. V.
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Houel, J.
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Russo-Averchi, E ...
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Morante, J. R.
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Cantoni, M.
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Marzari, N.
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Arbiol, J.
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Zunger, A.
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Warburton, R. J.
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Fontcuberta i Mo ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Nature Materials
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Lund University