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.
@article{arxiv.1508.01022,
title = {Electroabsorption study of index-defined semiconducting carbon nanotubes},
author = {Nicolas Izard and Etienne Gaufrès and Xavier Le Roux and Saïd Kazaoui and Yoichi Murakami and Delphine Marris-Morini and Eric Cassan and Shigeo Maruyama and Laurent Vivien},
journal= {arXiv preprint arXiv:1508.01022},
year = {2015}
}