Dissipative optomechanical coupling between a single-wall carbon nanotube and a high-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>Q</mml:mi></mml:math>microcavity

Abstract

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 $10\phantom{\rule{0.28em}{0ex}}\text{kHz}$. This strong coupling induces dissipative cooling of the nanotube oscillation, and ground-state cooling can be achieved.