# Coherent Control of Fano Resonances in a Macroscopic Four-Mirror Cavity

## TL;DR

This paper demonstrates how to coherently control Fano resonances in a large four-mirror optomechanical cavity using external mechanical pumps, enabling tunable optical features even at low drive amplitudes.

## Contribution

It introduces a method for tuning Fano resonances in a macroscopic cavity via external mechanical pumps, a novel approach in optomechanical control.

## Key findings

- Fano resonances can be coherently controlled by mechanical pump parameters.
- Tunable optomechanical features are achievable at very low mechanical drive amplitudes.
- The shape and nature of Fano profiles can be precisely manipulated.

## Abstract

We demonstrate coherent control of optomechanically induced transparency and Fano resonances in a four mirror macroscopic optomechanical cavity, with two movable mirrors, each driven by an external mechanical pump. The variable control of the amplitude and phase of the coherent mechanical pumps provides a means of tuning the shape and nature of the Fano profiles. Further, our scheme shows the occurrence of tunable optomechanical features, even at very low mechanical driving field amplitudes, in macroscopic optomechanical cavities.