title: Photoluminescence spectroscopy of carbon nanotube bundles: evidence for exciton energy transfer.
abstract: We investigate photoluminescence of nanotube bundles. Their spectra are explained by exciton energy transfer between adjacent tubes, whereby excitation of large gap tubes induces emission from smaller gap ones. The consequent relaxation rate is faster than nonradiative recombination, leading to enhanced photoluminescence of acceptor tubes.
authors.affiliation: Department of Engineering, University of Cambridge, Cambridge CB3 0FA, United Kingdom.
authors.forename: P H
authors.initials: PH
authors.lastname: Tan
authors.forename: A G
authors.initials: AG
authors.lastname: Rozhin
authors.forename: T
authors.initials: T
authors.lastname: Hasan
authors.forename: P
authors.initials: P
authors.lastname: Hu
authors.forename: V
authors.initials: V
authors.lastname: Scardaci
authors.forename: W I
authors.initials: WI
authors.lastname: Milne
authors.forename: A C
authors.initials: AC
authors.lastname: Ferrari