Fano profile in double cavity optomechanical system with harmonically bound mirrors

TL;DR

This paper explores a double cavity optomechanical system capable of generating tunable single and double Fano resonances by adjusting the tunneling rate, with implications for low-power optical switching.

Contribution

It demonstrates controllable switching between single and double Fano resonances in a double cavity optomechanical system using a single parameter, the tunneling rate g.

Findings

Single and double Fano resonances can be generated and controlled.

The strength of the spectral lines varies with the tunneling rate g.

Steady state displacement of the middle mirror influences Fano line shapes.

Abstract

We investigate a double cavity optomechanical system(OMS) generating single and double Fano resonance(multi Fano). By altering a single parameter, the tunneling rate $g$ of the middle mirror, we are able to switch between single and double Fano line shapes. The first spectral line shape is stronger in the case of multi Fano than in the case of single Fano. Also the behaviour of steady state value of the displacement of the middle mirror with respect to $g$, heavily influences the behaviour of double Fano lines in our scheme. This tunability along-with using a single pump and signal/probe laser has an added advantage in situations where only low power consumption is available.