Phys. Rev. B 79, 195445 (2009) [6 pages]

Dephasing in semiconducting single-walled carbon nanotubes induced by exciton-exciton annihilation

Abstract

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Darius Abramavicius¹, Ying-Zhong Ma², Matthew W. Graham², Leonas Valkunas¹, and Graham R. Fleming²
¹Department of Theoretical Physics, Faculty of Physics of Vilnius University, Sauletekio Avenue 9, Bldg. 3, Vilnius, LT 10222, Lithuania and Institute of Physics, Savanoriu 231, Vilnius LT 02300, Lithuania
²Department of Chemistry, University of California, Berkeley, and Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720-1460, USA

Received 30 January 2009; revised 15 April 2009; published 29 May 2009

Three-pulse photon echo peak-shift measurements were performed on semiconducting single-walled carbon nanotubes embedded in a polymer matrix at room temperature. We found a striking dependence of the peak shift on the excitation intensity. Numerical simulations based on an interacting-boson model demonstrate that the intensity dependence originates from a highly nonlinear optical response initiated by exciton-exciton annihilation.

URL:

http://link.aps.org/doi/10.1103/PhysRevB.79.195445

DOI:

10.1103/PhysRevB.79.195445

PACS:

78.67.Ch, 71.35.−y, 78.47.jf

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Phys. Rev. B 79, 195445 (2009) [6 pages]

Dephasing in semiconducting single-walled carbon nanotubes induced by exciton-exciton annihilation