Resonant enhancement of the zero-phonon emission from a color center in a diamond cavity

TL;DR

This paper demonstrates significant enhancement of zero-phonon emission from nitrogen-vacancy centers in diamond by coupling them to microring resonators, advancing integrated diamond photonics.

Contribution

It introduces a method to couple NV centers with diamond microring resonators, achieving over ten-fold zero-phonon line enhancement using standard fabrication techniques.

Findings

Over ten-fold enhancement of zero-phonon emission

Successful fabrication of diamond photonic devices

Potential for integrated diamond quantum photonics

Abstract

We demonstrate coupling of the zero-phonon line of individual nitrogen-vacancy centers and the modes of microring resonators fabricated in single-crystal diamond. A zero-phonon line enhancement exceeding ten-fold is estimated from lifetime measurements at cryogenic temperatures. The devices are fabricated using standard semiconductor techniques and off-the-shelf materials, thus enabling integrated diamond photonics.