Virt. J. Ultrafast Sci. / Volume 9 / Issue 2 / CONDENSED MATTER PHYSICS

Saturation of the Photoluminescence at Few-Exciton Levels in a Single-Walled Carbon Nanotube under Ultrafast Excitation

Source: Phys. Rev. Lett. 104, 017401 (2010); doi:10.1103/PhysRevLett.104.017401

Published 8 January 2010

ABSTRACT

^* Full Text: Access via Source Journal Abstract

PACS

78.67.Ch
Optical properties of nanotubes
71.35.-y
Excitons and related phenomena
78.47.jc
78.55.Kz
Photoluminescence in solid organic materials
YEAR: 2010

PUBLICATION DATA

ISSN:

1553-9601 (online)

Publisher:

APS

Y.-F. Xiao, T. Q. Nhan, M. W. B. Wilson, and James M. Fraser
Department of Physics, Engineering Physics & Astronomy, Queen's University, Kingston, Ontario, K7L 3N6 Canada

Singleair-suspended carbon nanotubes (length 2–5 µm) exhibit high optical quantum efficiency(7–20%) for low intensity resonant pumping. Under ultrafast excitation (150 fs),emission dramatically saturates at very low exciton numbers (2–6), whichis attributed to highly efficient exciton-exciton annihilation over micron-length scales.Similar saturation behavior for 4 ps pulse excitation shows nonlinear absorptionis not a contributing factor. The absorption cross sections (0.6–1.8×10^-17 cm²/atom)are determined by fitting to a stochastic model for excitondynamics. ©2010 The American Physical Society

History:	Received 24 April 2009; published 8 January 2010
Permalink:	http://link.aps.org/abstract/PRL/v104/e017401

Hole and trion spin dynamics in quantum dots under excitation by a train of circularly polarized pulses

Ultrafast Pump-Probe Study of Phase Separation and Competing Orders in the Underdoped (Ba,K)Fe₂As₂ Superconductor

Saturation of the Photoluminescence at Few-Exciton Levels in a Single-Walled Carbon Nanotube under Ultrafast Excitation

Source: Phys. Rev. Lett. 104, 017401 (2010); doi:10.1103/PhysRevLett.104.017401

Hole and trion spin dynamics in quantum dots under excitation by a train of circularly polarized pulses

Ultrafast Pump-Probe Study of Phase Separation and Competing Orders in the Underdoped (Ba,K)Fe2As2 Superconductor

Saturation of the Photoluminescence at Few-Exciton Levels in a Single-Walled Carbon Nanotube under Ultrafast Excitation

Source: Phys. Rev. Lett. 104, 017401 (2010); doi:10.1103/PhysRevLett.104.017401

Ultrafast Pump-Probe Study of Phase Separation and Competing Orders in the Underdoped (Ba,K)Fe₂As₂ Superconductor