Room-temperature exciton storage in elongated semiconductor nanocrystals
Room-temperature exciton storage in elongated semiconductor nanocrystals
The excited state of colloidal nanoheterostructures consisting of a spherical CdSe nanocrystal with an epitaxially attached CdS rod can be perturbed effectively by electric fields. Field-induced fluorescence quenching coincides with a conversion of the excited state species from the bright exciton to a metastable trapped state (dark exciton) characterized by a power-law luminescence decay. The conversion is reversible so that up to 10% of quenched excitons recombine radiatively post turn-off of a 1 µs field pulse, increasing the delayed luminescence by a factor of 80. Excitons can be stored for up to 105 times the natural lifetime, opening up applications in optical memory elements.
017401-[4pp]
Kraus, R.M.
3412f013-623a-448c-a954-2e4350b9b344
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Rogach, A.L.
27195408-14d5-4184-bb03-82c462a6aaa9
Talapin, D.V.
097e3ed8-cb57-41ac-a0e3-cee79f83b8bb
Weller, H.
e6dadafe-9d4c-448e-9176-567d129765cc
Lupton, J.M.
48290c8f-dc29-47f3-9045-2281590587e9
Feldmann, J.
98d048f6-c77d-47b1-827c-256b8f04ee70
4 January 2007
Kraus, R.M.
3412f013-623a-448c-a954-2e4350b9b344
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Rogach, A.L.
27195408-14d5-4184-bb03-82c462a6aaa9
Talapin, D.V.
097e3ed8-cb57-41ac-a0e3-cee79f83b8bb
Weller, H.
e6dadafe-9d4c-448e-9176-567d129765cc
Lupton, J.M.
48290c8f-dc29-47f3-9045-2281590587e9
Feldmann, J.
98d048f6-c77d-47b1-827c-256b8f04ee70
Kraus, R.M., Lagoudakis, P.G., Rogach, A.L., Talapin, D.V., Weller, H., Lupton, J.M. and Feldmann, J.
(2007)
Room-temperature exciton storage in elongated semiconductor nanocrystals.
Physical Review Letters, 98 (1), .
(doi:10.1103/PhysRevLett.98.017401).
Abstract
The excited state of colloidal nanoheterostructures consisting of a spherical CdSe nanocrystal with an epitaxially attached CdS rod can be perturbed effectively by electric fields. Field-induced fluorescence quenching coincides with a conversion of the excited state species from the bright exciton to a metastable trapped state (dark exciton) characterized by a power-law luminescence decay. The conversion is reversible so that up to 10% of quenched excitons recombine radiatively post turn-off of a 1 µs field pulse, increasing the delayed luminescence by a factor of 80. Excitons can be stored for up to 105 times the natural lifetime, opening up applications in optical memory elements.
This record has no associated files available for download.
More information
Submitted date: 11 July 2006
Published date: 4 January 2007
Identifiers
Local EPrints ID: 44867
URI: http://eprints.soton.ac.uk/id/eprint/44867
ISSN: 0031-9007
PURE UUID: aadd1ff9-4ad4-4f48-9d19-d461d99b82c4
Catalogue record
Date deposited: 20 Mar 2007
Last modified: 15 Mar 2024 09:08
Export record
Altmetrics
Contributors
Author:
R.M. Kraus
Author:
P.G. Lagoudakis
Author:
A.L. Rogach
Author:
D.V. Talapin
Author:
H. Weller
Author:
J.M. Lupton
Author:
J. Feldmann
Download statistics
Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.
View more statistics