title: Influences of Exciton Diffusion and Exciton-Exciton Annihilation on Photon Emission Statistics of Carbon Nanotubes.
abstract: Pump-dependent photoluminescence imaging and second-order photon correlation studies have been performed on individual single-walled carbon nanotubes (SWCNTs) at room temperature. These studies enable the extraction of both the exciton diffusion constant and the Auger recombination coefficient. A linear correlation between these parameters is attributed to the effect of environmental disorder in setting the exciton mean free path and capture-limited Auger recombination at this length scale. A suppression of photon antibunching is attributed to the creation of multiple spatially nonoverlapping excitons in SWCNTs, whose diffusion length is shorter than the laser spot size. We conclude that complete antibunching at room temperature requires an enhancement of the exciton-exciton annihilation rate that may become realizable in SWCNTs allowing for strong exciton localization.
authors.affiliation: Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Xuedan
authors.initials: X
authors.lastname: Ma
authors.affiliation: Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.|Department of Physics and Engineering Physics, Fordham University, Bronx, New York 10458, USA.
authors.forename: Oleskiy
authors.initials: O
authors.lastname: Roslyak
authors.affiliation: Physical Chemistry and Applied Spectroscopy, Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Juan G
authors.initials: JG
authors.lastname: Duque
authors.affiliation: High Power Electrodynamics, Accelerator Operations and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Pang
authors.affiliation: Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Stephen K
authors.initials: SK
authors.lastname: Doorn
authors.affiliation: Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Andrei
authors.initials: A
authors.lastname: Piryatinski
authors.affiliation: Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA.
authors.forename: David H
authors.initials: DH
authors.lastname: Dunlap
authors.affiliation: Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
authors.forename: Han
authors.initials: H
authors.lastname: Htoon