Single-photon controlled switch based on the giant Kerr nonlinearity in the single-spin coupled to levitated nanodiamonds

Jian Liu, Ka-Di Zhu
The photonic devices play a key role in optical communication networks and quantum networks. Here we analyze an optomechanical coupling between levitated nano-mechanical resonator and a nitrogen-vacancy(NV) center that exhibits a giant enhanced nonlinearity. Then we propose an experimentally accessible optical switch scheme at the single-photon level due to the optomechanically induced Kerr effect and show the pump power for the switch is reduced to 10^-19 W. This is a promising device for future optomechanics-based photonic quantum computing and quantum networks.

DOI