Regular Article

Improve the sensitivity of an optomechanical sensor with the auxiliary mechanical oscillator

School of Physics, Dalian University of Technology, Dalian 116024, P.R. China

^a e-mail: zhlhxn@dlut.edu.cn

Received: 26 February 2018
Received in final form: 22 April 2018
Published online: 19 June 2018

Abstract

A scheme of weak force detection in coupled oscillator optomechanical system has been proposed. By introducing the auxiliary oscillator, we can improve the sensitivity, reduce the additional noise and enlarge the intensity of the output spectrum. Different with employing squeezing light to directly reduce shot noise, our method make use of destructive coherence effect between the cavity field and the additional oscillator to cancel the cavity noise, which provides us a alternatively promising platform for improving the sensitivity of ultrasensitive detection in optomechanical system.