Controllable optical bistability based on photons and phonons in a two-mode optomechanical system

TL;DR

This paper theoretically investigates how optical bistability in a two-mode cavity optomechanical system can be controlled via pump laser parameters, revealing potential for optical switching applications.

Contribution

It demonstrates controllable optical bistability in a two-mode system through pump tuning and shows bistability at photon numbers below unity, a novel phenomenon.

Findings

Optical bistability can be controlled by pump power and frequency.

Bistability at photon numbers below unity is observed.

Control of bistability in one cavity via another is demonstrated.

Abstract

We explore theoretically the bistable behavior of intracavity photon number in a two-mode cavity optomechanical system, where two cavity modes are coupled to a common mechanical resonator. When the two cavity modes are driven by two pump laser beams, respectively, we find that the optical bistability can be controlled by tuning the power and frequency of the pump beams. The common interaction to a mechanical mode enables one to control the bistable behavior in one cavity by adjusting the pump laser beam driving another cavity. We also show that both branches of optical bistability at photon numbers below unity can be observed in this two-mode optomechanical system. This phenomenon can find potential applications in controllable optical switch.