Cavity-enhanced Raman scattering of single-walled carbon nanotubes

We have demonstrated the cavity-enhanced Raman scattering of semiconducting single-walled carbon nanotubes (CNTs) deposited in a silicon photonic crystal (Si PhC) nanocavity. In a resonant nanocavity, the detected Raman intensity of the CNTs is 100 times larger than that of the CNTs on a flat Si film. This enhancement results from the large local density of photon states and the large light extraction efficiency of the nanocavity. The cavity-enhanced Raman scattering of the CNTs suggests a way to develop a low-threshold CNT-based Raman laser. (C) 2013 AIP Publishing LLC.