# Optomechanically amplified wavelength conversion in diamond microcavities

## TL;DR

This paper demonstrates efficient optomechanical wavelength conversion and amplification in diamond microcavities, enabling low-noise interfacing of quantum emitters at different wavelengths with high efficiency.

## Contribution

It introduces the first demonstration of optomechanical frequency conversion with amplification in diamond microcavities, achieving high internal conversion efficiency.

## Key findings

- Internal conversion efficiency of ~45%
- First demonstration of optomechanical frequency conversion with amplification
- Applicable to quantum technologies with diverse emitters

## Abstract

Efficient, low noise conversion between different colors of light is a necessary tool for interfacing quantum optical technologies that have different operating wavelengths. Optomechanically mediated wavelength conversion and amplification is a potential method for realizing this technology, and is demonstrated here in microdisks fabricated from single crystal diamond--a material that can host a wide range of quantum emitters. Frequency up--conversion is demonstrated with internal conversion efficiency of $\sim$45% using both narrow and broadband probe fields, and optomechanical frequency conversion with amplification is demonstrated in the optical regime for the first time.