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Wave function engineering in elongated semiconductor nanocrystals with heterogeneous carrier confinement

Wave function engineering in elongated semiconductor nanocrystals with heterogeneous carrier confinement
Wave function engineering in elongated semiconductor nanocrystals with heterogeneous carrier confinement
We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying the aspect ratio of the nanoparticle allows control over the electron-hole overlap (radiative rate), and external electric fields manipulate the interaction between the delocalized electron and the localized hole. In agreement with theory, this leads to an exceptional size dependent quantum confined Stark effect with field induced intensity modulations, opening applications as electrically switchable single photon sources.
1530-6984
2044-2049
Müller, J.
b83ab63e-1f20-4eb3-a0bb-7cd0856dbe2b
Lupton, J.M.
48290c8f-dc29-47f3-9045-2281590587e9
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Schindler, F.
25829a84-964f-4801-94ef-674f34eacf89
Koeppe, R.
3ebf9978-1f09-44c4-a772-c837ab8d7345
Rogach, A.L.
27195408-14d5-4184-bb03-82c462a6aaa9
Feldmann, J.
98d048f6-c77d-47b1-827c-256b8f04ee70
Müller, J.
b83ab63e-1f20-4eb3-a0bb-7cd0856dbe2b
Lupton, J.M.
48290c8f-dc29-47f3-9045-2281590587e9
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Schindler, F.
25829a84-964f-4801-94ef-674f34eacf89
Koeppe, R.
3ebf9978-1f09-44c4-a772-c837ab8d7345
Rogach, A.L.
27195408-14d5-4184-bb03-82c462a6aaa9
Feldmann, J.
98d048f6-c77d-47b1-827c-256b8f04ee70

Müller, J., Lupton, J.M., Lagoudakis, P.G., Schindler, F., Koeppe, R., Rogach, A.L. and Feldmann, J. (2005) Wave function engineering in elongated semiconductor nanocrystals with heterogeneous carrier confinement. Nano Letters, 5 (10), 2044-2049. (doi:10.1021/nl051596x).

Record type: Article

Abstract

We explore two routes to wave function engineering in elongated colloidal CdSe/CdS quantum dots, providing deep insight into the intrinsic physics of these low-dimensional heterostructures. Varying the aspect ratio of the nanoparticle allows control over the electron-hole overlap (radiative rate), and external electric fields manipulate the interaction between the delocalized electron and the localized hole. In agreement with theory, this leads to an exceptional size dependent quantum confined Stark effect with field induced intensity modulations, opening applications as electrically switchable single photon sources.

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Published date: 2005

Identifiers

Local EPrints ID: 19268
URI: http://eprints.soton.ac.uk/id/eprint/19268
ISSN: 1530-6984
PURE UUID: f46cdacf-e64d-4f92-9ae1-fb3eef6d9b05

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Date deposited: 30 Jan 2006
Last modified: 02 Dec 2019 19:37

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Contributors

Author: J. Müller
Author: J.M. Lupton
Author: P.G. Lagoudakis
Author: F. Schindler
Author: R. Koeppe
Author: A.L. Rogach
Author: J. Feldmann

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