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Proceedings Paper

Single carbon nanotube photonics and the role of excitons
Author(s): Libai Huang; Todd Krauss
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Paper Abstract

Many-body effects in single-walled carbon nanotubes (SWNTs) were investigated using multi-color transient absorption spectroscopy. A population of excitons in isolated SWNTs was created by resonantly exciting the lowest allowed excitonic transition. With low pump fluence, photo-induced bleaching was observed regardless of the probe energy, as expected. However, at high pump fluence, photo-induced absorption was observed when probing at a higher energy than the pump. These observations are consistent with a blue-shifted exciton absorption due to phase-space filling effects at high exciton densities. As a result of the rapid loss of excited state population through Auger recombination, the blue shift recovered with a time constant of less than 1 ps.

Paper Details

Date Published: 30 August 2006
PDF: 7 pages
Proc. SPIE 6325, Physical Chemistry of Interfaces and Nanomaterials V, 632502 (30 August 2006); doi: 10.1117/12.679609
Show Author Affiliations
Libai Huang, Univ. of Rochester (United States)
Todd Krauss, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 6325:
Physical Chemistry of Interfaces and Nanomaterials V
Mark Spitler; Frank Willig, Editor(s)

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