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Proceedings Paper

Individual single-wall carbon nanotube photonics
Author(s): Libai Huang; Achim Hartschuh; Hermenegildo N. Pedrosa; Jeffrey Peterson; Mathias Steiner; Lukas Novotny; Todd D. Krauss
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Paper Abstract

The electronic structure of SWNTs was investigated using the complementary techniques of single molecule photoluminescence spectroscopy and ultrafast optical spectroscopy. We found that photoexcited electrons in SWNTs isolated in surfactant micelles decay through many channels exhibiting a range of decay times (~200 fs to ~ 120 ps). The magnitude of the longest-lived component in the ultrafast signal specifically depends on resonant excitation, thus suggesting that this lifetime corresponds to the band-edge relaxation time. Fluorescence spectra from single SWNTs are well described by a single, Lorentzian lineshape. However, nanotubes with identical structure fluoresce over a distribution of peak positions and line widths not observed in ensemble studies, caused by localized defects and electrostatic perturbations. Unlike for most other single molecules, for SWNTs the photoluminescence unexpectedly does not show any intensity or spectral fluctuations at 300K. This lack of photoluminescence intensity blinking or bleaching demonstrates that SWNTs have the potential to provide a stable, single molecule infrared photon source, allowing for the exciting possibility of single nanotube integrated photonic devices and biophotonic sensors.

Paper Details

Date Published: 14 October 2004
PDF: 13 pages
Proc. SPIE 5513, Physical Chemistry of Interfaces and Nanomaterials III, (14 October 2004); doi: 10.1117/12.558935
Show Author Affiliations
Libai Huang, Univ. of Rochester (United States)
Achim Hartschuh, Institute of Optics/Univ. Siegen (Germany)
Univ. of Rochester (United States)
Hermenegildo N. Pedrosa, Univ. of Rochester (United States)
Jeffrey Peterson, Univ. of Rochester (United States)
Mathias Steiner, Univ. Siegen (Germany)
Lukas Novotny, Institute of Optics/Univ. of Rochester (United States)
Todd D. Krauss, Univ. of Rochester (United States)

Published in SPIE Proceedings Vol. 5513:
Physical Chemistry of Interfaces and Nanomaterials III
Gregory V. Hartland; Xiao-Yang Zhu, Editor(s)

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