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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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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
Divisions : Surrey research (other units)
Authors :
Allam, J
Sutton, R
Sajjad, MT
Wang, Z
Siddique, S
Yang, QH
Brown, T
Loh, W
Date : 1 December 2010
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 13:14
Last Modified : 24 Jan 2020 23:39

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