Optomechanically induced transparency and gain

TL;DR

This paper investigates optomechanically induced transparency and gain in a simple cavity-mechanical system, highlighting the effects of non-rotating wave approximation and revealing conditions for narrow transparency dips and maximum gain.

Contribution

It introduces the consideration of non-rotating wave approximation effects, providing new insights into the transparency dip width and gain in optomechanical systems.

Findings

Ideal transparency dip can be achieved with NRWA effects.

Transparency dip width can be very narrow in unresolved sideband regime.

Analytic expression for maximum optomechanically induced gain is provided.

Abstract

Optomechanically induced transparency is an important quantum phenomenon in cavity optomechanics. Here, we study the properties of optomechanically induced transparency in the simplest optomechanical system (consisting of one cavity and one mechanical resonator) considering the effect of non-rotating wave approximation (NRWA) that was ignored in previous works. With the NRWA effect, we find the ideal optomechanically induced transparency dip can be easily achieved, and the width of optomechanically induced transparency dip can become very narrow especially in unresolved sideband regime. Finally, we study the properties of optomechanically induced gain, and give the analytic expression about the maximum value of gain.