Induced transparency in optomechanically coupled resonators

TL;DR

This paper theoretically explores a hybrid optomechanical system of coupled resonators that exhibits induced transparency, enabling weak force detection with sensitivities surpassing the standard quantum limit.

Contribution

It introduces a novel hybrid resonator system demonstrating induced transparency and analyzes its potential for ultra-sensitive weak force detection.

Findings

System exhibits bistability, isolas, and self-sustained oscillations.

Transparency window depends on mechanical motion.

Can detect weak forces with sensitivity beyond quantum limits.

Abstract

In this work we theoretically investigate a hybrid system of two optomechanically coupled resonators, which exhibits induced transparency. This is realized by coupling an optical ring resonator to a toroid. In the semiclassical analyses, the system displays bistabilities, isolated branches (isolas) and self-sustained oscillation dynamics. Furthermore, we find that the induced transparency transparency window sensitively relies on the mechanical motion. Based on this fact, we show that the described system can be used as a weak force detector and the optimal sensitivity can beat the standard quantum limit without using feedback control or squeezing under available experimental conditions.