Increasing the photon collection rate from a single NV center with a silver mirror

TL;DR

This paper demonstrates a method to enhance photon collection from a single NV center in diamond by placing a silver mirror on an optical fiber, increasing the photon count rate significantly at ambient conditions.

Contribution

The study introduces a simple, effective technique to boost photon collection efficiency from a single NV center using a fiber-integrated silver mirror.

Findings

Photon count rate increased by up to 1.76 times

Method effective at ambient conditions

Potential for improved quantum optical networks

Abstract

In the pursuit of realizing quantum optical networks, a large variety of different approaches have been studied to achieve a single photon source on-demand. The common goal for these approaches is to harvest all the emission from a quantum emitter into a single spatial optical mode while maintaining a high signal-to-noise ratio. In this work, we use a single nitrogen vacancy center in diamond as a quantum emitter operating at ambient conditions and we demonstrate an increased photon count rate up to a factor of 1.76 by placing a silver mirror fabricated on the end facet of an optical fiber near the emitter.