Controllable double optical bistability via photon and phonon interaction in a hybrid optomechanical system

TL;DR

This paper theoretically investigates controllable double optical bistability in a hybrid optomechanical system with two mechanical oscillators, demonstrating tunable bistability behavior via pump power, cavity coupling, and sideband regimes.

Contribution

It introduces a method to control and observe double optical bistability in a multi-mode optomechanical system through adjustable parameters.

Findings

Bistability can be tuned by pump laser strength.

Double bistability occurs at a critical control field power.

Critical values are adjustable via cavity and mechanical couplings.

Abstract

The optical bistability have been studied theoretically in a multi-mode optomechanical system with two mechanical oscillators independently coupled to two cavities in addition to direct tunnel coupling between cavities. It is proved that the bistable behavior of mean intracavity photon number in the right cavity can be tuned by adjusting the strength of the pump laser beam driving the left cavity. And the mean intracavity photon number is relatively larger in the red sideband regime than that in the blue sideband regime. Moreover, we have shown that the double optical bistability of intracavity photon in the right cavity and the two steady-state positions of mechanical resonators can be observed when the control field power is increased to a critical value. Besides, the critical values for observing bistability and double bistability can be tuned by adjusting the coupling coefficient between two cavities and the coupling rates between cavities mode and mechanical mode.