Control and manipulation of electromagentically induced transparency in a nonlinear optomechanical system with two movable mirrors

TL;DR

This paper explores how a nonlinear optomechanical system with two movable mirrors can control electromagnetically induced transparency (EIT), enabling tunable resonance features and absorption characteristics for advanced optical applications.

Contribution

It demonstrates the manipulation of EIT resonance splitting and absorption peaks using mechanical oscillations and nonlinearity in a dual-mirror optomechanical cavity with a Kerr-down conversion crystal.

Findings

Mechanical oscillations cause EIT resonance splitting.

Nonlinearity allows tuning of transparency window width.

Presence of nonlinear crystal enhances control over spectral features.

Abstract

We consider an optomechanical cavity made by two moving mirrors which contains a Kerr-down conversion nonlinear crystal. We show that the coherent oscillations of the two mechanical oscil- lators can lead to splitting in the electromagnetically induced transparency (EIT) resonance, and appearance of an absorption peak within the transparency window. In this configuration the coher- ent induced splitting of EIT is similar to driving a hyperfine transition in an atomic Lambda-type three-level system by a radio-frequency or microwave field. Also, we show that the presence of non- linearity provides an additional flexibility for adjusting the width of the transparency windows. The combination of an additional mechanical mode and the nonlinear crystal suggests new possibilities for adjusting the resonance frequency, the width and the spectral positions of the EIT windows as well as the enhancement of the absorption peak within the transparency window.