Combination of dissipative and dispersive coupling in the cavity optomechanical systems

TL;DR

This paper analyzes a Fabry-Perot cavity with combined dissipative and dispersive optomechanical coupling, revealing unique optical rigidity effects and proposing enhanced force detection and squeezing capabilities beyond traditional methods.

Contribution

It introduces the concept of combined coupling leading to optical rigidity and demonstrates potential for improved force sensing and controllable squeezing in optomechanical systems.

Findings

Combined coupling induces optical rigidity at resonant pump.

System can detect small forces with sensitivity surpassing SQL.

Creates ponderomotive squeezing with wider controllable parameters.

Abstract

An analysis is given for the Fabry-Perot cavity having a combination of dissipative and dispersive optomechanical coupling. It is established that the combined coupling leads to optical rigidity. At the same time, this rigidity appears in systems with the combined coupling on the resonant pump, which is not typical for pure dispersive and dissipative couplings. A proposal is made to use this system to detect small signal forces with better sensitivity than SQL. It is also demonstrated that this optomechanical system can create ponderomotive squeezing with controllable parameters over a wider range than ponderomotive squeezing using dispersive coupling.