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Reaction, diffusion and dissociation of excitons on carbon nanotubes

Allam, J, Sutton, R, Sajjad, MT, Litvinenko, K, Wang, Z, Siddique, S, Yang, QH, Brown, T and Loh, W (2010) Reaction, diffusion and dissociation of excitons on carbon nanotubes Optics InfoBase Conference Papers.

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Abstract

Photoexcitation of carbon nanotubes generates excitons which decay by exciton-exciton annihilation at sufficient density. We examine this decay under conditions of one, few and many excitons per nanotube. A classic 1D reaction-diffusion behaviour is observed, with decay limited by diffusion for t>3ps and by reaction for t<3ps. At high densities the exciton population saturates, and by analysis of the rate equations we show that this is consistent with dissociation of excitons when their spacing is 1.3nm, close to the exciton length. © 2010 Optical Society of America.

Item Type: Article
Authors :
NameEmailORCID
Allam, JUNSPECIFIEDUNSPECIFIED
Sutton, RUNSPECIFIEDUNSPECIFIED
Sajjad, MTUNSPECIFIEDUNSPECIFIED
Litvinenko, Kk.litvinenko@surrey.ac.ukUNSPECIFIED
Wang, ZUNSPECIFIEDUNSPECIFIED
Siddique, SUNSPECIFIEDUNSPECIFIED
Yang, QHUNSPECIFIEDUNSPECIFIED
Brown, TUNSPECIFIEDUNSPECIFIED
Loh, WUNSPECIFIEDUNSPECIFIED
Date : 1 December 2010
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:14
Last Modified : 17 May 2017 15:09
URI: http://epubs.surrey.ac.uk/id/eprint/838486

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