The efficient cooling of the nanomechanical resonators is essential to exploration of quantum properties of the macroscopic or mesoscopic systems. We propose such a laser-cooling scheme for a nanomechanical cantilever, which works even for the low-frequency mechanical mode and under weak cooling lasers. The cantilever is attached by a diamond nitrogen-vacancy center under a strong magnetic field gradient and the cooling is assisted by a dynamical Stark-shift gate. Our scheme can effectively enhance the desired cooling efficiency by avoiding the off-resonant and unexpected carrier transitions, and thereby cool the cantilever down to the vicinity of the vibrational ground state in a fast fashion.
@article{arxiv.1406.1611,
title = {Fast optical cooling of a nanomechanical cantilever by a dynamical Stark-shift gate},
author = {Leilei Yan and Jian-Qi Zhang and Shuo Zhang and Mang Feng},
journal= {arXiv preprint arXiv:1406.1611},
year = {2015}
}