Semiconducting single-wall carbon nanotubes (s-SWNTs) have proved to be promising material for nanophotonics and optoelectronics. Due to the possibility of tuning their direct band gap and controlling excitonic recombinations in the near-infrared wavelength range, s-SWNT can be used as efficient light emitters. We report the first experimental demonstration of room temperature intrinsic optical gain as high as 190 cm-1 at a wavelength of 1.3 {\mu}m in a thin film doped with s-SWNT. These results constitute a significant milestone toward the development of laser sources based on carbon nanotubes for future high performance integrated circuits.
@article{arxiv.1011.6088,
title = {Optical Gain in Carbon Nanotubes},
author = {Etienne Gaufrès and Nicolas Izard and Xavier Le Roux and Delphine Marris-Morini and Saïd Kazaoui and Eric Cassan and Laurent Vivien},
journal= {arXiv preprint arXiv:1011.6088},
year = {2010}
}