Enhancement of the Zero Phonon Line emission from a Single NV-Center in a Nanodiamond via Coupling to a Photonic Crystal Cavity

TL;DR

This paper demonstrates a significant enhancement of zero phonon line emission from a single NV-center in a nanodiamond by coupling it to a gallium phosphide photonic crystal cavity, advancing quantum optical device integration.

Contribution

It introduces a nanomanipulation technique to position nanodiamonds on photonic cavities and reports a 12.1-fold Purcell enhancement of ZPL emission, a key step for quantum technologies.

Findings

Achieved 12.1-fold Purcell enhancement of ZPL emission.

Successfully coupled a single NV-center to a photonic crystal cavity.

Paves the way for integrated diamond-based quantum optical devices.

Abstract

Using a nanomanipulation technique a nanodiamond with a single nitrogen vacancy center is placed directly on the surface of a gallium phosphide photonic crystal cavity. A Purcell-enhancement of the fluorescence emission at the zero phonon line (ZPL) by a factor of 12.1 is observed. The ZPL coupling is a first crucial step towards future diamond-based integrated quantum optical devices.