# Controlling Multimode Optomechanical Interactions via Interference

## TL;DR

This paper demonstrates how optomechanical interference can control interactions in a multimode system, enabling suppression or enhancement of mechanical damping through phase-dependent coupling, advancing control over light-mechanical interactions.

## Contribution

It introduces a phase-dependent excitation-coupling method to observe and manipulate optomechanical interference in multimode systems, a novel control technique.

## Key findings

- Destructive interference suppresses mechanical damping.
- Constructive interference enhances optomechanical coupling.
- Phase control enables tunable interaction strength.

## Abstract

We demonstrate optomechanical interference in a multimode system, in which an optical mode couples to two mechanical modes. A phase-dependent excitation-coupling approach is developed, which enables the observation of constructive and destructive optomechanical interferences. The destructive interference prevents the coupling of the mechanical system to the optical mode, suppressing optically-induced mechanical damping. These studies establish optomechanical interference as an essential tool for controlling the interactions between light and mechanical oscillators.

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Source: https://tomesphere.com/paper/1705.04722