# Force-induced transparency and conversion between slow and fast lights in optomechanics

## TL;DR

This paper theoretically explores how external forces can induce transparency and enable conversion between slow and fast light in an optomechanical cavity, offering new methods for controlling light velocity and force detection.

## Contribution

It introduces a novel theoretical framework showing force-controlled transparency and light conversion in optomechanics, leveraging RWA and anti-RWA effects.

## Key findings

- Force-induced transparency of slow/fast light demonstrated
- Conversion between slow and fast lights controlled by external force
- Potential applications in light velocity control and force sensing

## Abstract

The optomechanics can generate fantastic effects of optics due to appropriate mechanical control. Here we theoretically study effects of slow and fast lights in a single-sided optomechanical cavity with an external force. The force-induced transparency of slow/fast light and the force-dependent conversion between the slow and fast lights are resulted from effects of the rotating-wave approximation (RWA) and the anti-RWA, which can be controlled by properly modifying the effective cavity frequency due to the external force. These force-induced phenomena can be applied to control of the light group velocity and detection of the force variation, which are feasible using current laboratory techniques.