Optomechanically induced transparency in membrane-in-the-middle setup at room temperature

TL;DR

This paper demonstrates optomechanically induced transparency and related phenomena at room temperature using a membrane-in-the-middle cavity setup, showing controllable light slowing and amplification effects.

Contribution

It presents the first room-temperature demonstration of optomechanically induced transparency in a membrane-in-the-middle cavity system.

Findings

Complete reflection of probe field at red sideband resonance

Tunable slow light with microsecond delay

Observation of electromagnetically induced amplification

Abstract

We demonstrate the analogue of electromagnetically induced transparency in a room temperature cavity optomechanics setup formed by a thin semitransparent membrane within a Fabry-P\'erot cavity. Due to destructive interference, a weak probe field is completely reflected by the cavity when the pump beam is resonant with the motional red sideband of the cavity. Under this condition we infer a significant slowing down of light of hundreds of microseconds, which is easily tuned by shifting the membrane along the cavity axis. We also observe the associated phenomenon of electromagnetically induced amplification which occurs due to constructive interference when the pump is resonant with the blue sideband.