Dissipative optomechanical coupling between a single-wall carbon nanotube and a high-Q microcavity

摘要

We theoretically investigate optomechanical coupling between a single-wall carbon nanotube and a high-Q whispering gallery microcavity. The anisotropy in the refractive index of the nanotube results in polarization-sensitive optomechanical coupling. Moreover, the band structure of the nanotube leads to a strong dependence of the coupling strength on wavelength. In particular, strong and pure dissipative coupling can be achieved at the absorption resonance frequency of the nanotube, and the single-photon coupling strength can exceed 10kHz. This strong coupling induces dissipative cooling of the nanotube oscillation, and ground-state cooling can be achieved.