Eur. Phys. J. Appl. Phys.
Volume 55, Number 2, August 2011
|Number of page(s)||4|
|Section||Nanomaterials and Nanotechnologies|
|Published online||11 August 2011|
Electroabsorption study of index-defined semiconducting carbon nanotubes
A direct probe into carbon nanotube excitonic states
Institut d’Électronique Fondamentale, CNRS-UMR 8622, Univ. Paris-Sud, 91405 Orsay, France
2 National Institute of Advance Industrial Science and Technology (AIST), Tsukuba 305-8565, Japan
3 Global Edge Institute, Tokyo Institute of Technology, Tokyo, Japan
4 Department of Mechanical Engineering, The University of Tokyo, Tokyo, Japan
a e-mail: firstname.lastname@example.org
Accepted: 15 March 2011
Published online: 11 August 2011
Electroabsorption spectroscopy of well-identified index-defined semiconducting carbon nanotubes is reported. The measurement of high definition electroabsorption spectra allows direct indexation with unique nanotube chirality. Results show that at least for a limited range of diameters, electroabsorption is directly proportional to the exciton binding energy of nanotubes. Electroabsorption is a powerful technique which directly probes into carbon nanotube excitonic states, and may become a useful tool for in situ study of excitons in future nanotube-based photonic devices such as electroabsorption modulators.
© EDP Sciences, 2011
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