Stochastic resonance in a tristable optomechanical system

TL;DR

This paper theoretically explores stochastic resonance in a tristable optomechanical membrane system, revealing how dual signals and noise induce and enhance resonance phenomena with distinct behaviors.

Contribution

It introduces the first analysis of SR in a tristable optomechanical system with dual signals, highlighting different roles of optical and mechanical inputs.

Findings

SR occurs in a tristable regime with noise-induced switching

Optical and mechanical signals produce distinct SR behaviors

Coexistence of signals enhances SR and causes beating effects

Abstract

In this work we theoretically investigate the stochastic resonance (SR) effect in an optomechanical membrane system subject to two weak signals (one optical field and one mechanical force). The quadratic optomechanical coupling allows us to find a region with tristability where the noise activated stochastic switching among three stable states occurs and SR phenomena are observed at the cooperation of input signals and noises. We show that the mechanical force and the optical field respectively serve as an additive signal and a multiplicative signal to the membrane position and they induce completely different SR behaviors. Moreover, when two signals coexist the SR effect can be enhanced and the beating effect appears in the SR synchronization process with unsynchronized signals.