Nanoimplantation and Purcell enhancement of single NV centers in photonic crystal cavities in diamond

TL;DR

This paper demonstrates precise placement of single NV centers in diamond photonic crystal cavities and shows Purcell enhancement of their emission, advancing quantum photonics applications.

Contribution

It introduces a method for controlled NV center implantation in diamond cavities with high spatial accuracy and demonstrates Purcell enhancement of emission.

Findings

Successful ion implantation at the cavity center

Observation of Purcell enhancement of NV emission

Agreement with theoretical cavity coupling model

Abstract

We present the controlled creation of single nitrogen-vacancy (NV) centers via ion implantation at the center of a photonic crystal cavity which is fabricated in an ultrapure, single crystal diamond membrane. High-resolution placement of NV centers is achieved using collimation of a 5keV-nitrogen ion beam through a pierced tip of an atomic force microscope (AFM). We demonstrate coupling of the implanted NV centers' broad band fluorescence to a cavity mode and observe Purcell enhancement of the spontaneous emission. The results are in good agreement with a master equation model for the cavity coupling.