Deterministic coupling of a single silicon-vacancy color center to a photonic crystal cavity in diamond

TL;DR

This paper demonstrates the deterministic integration of a single silicon-vacancy color center in diamond with a photonic crystal cavity, significantly enhancing its emission properties at room temperature for quantum information applications.

Contribution

The work presents a novel fabrication method for coupling a preselected silicon-vacancy center to a nanocavity, achieving substantial Purcell enhancement and lifetime reduction.

Findings

Resonant Purcell enhancement factor of 19

2.5-fold reduction in emitter lifetime

Modification of internal population dynamics and quantum efficiency

Abstract

Deterministic coupling of single solid-state emitters to nanocavities is the key for integrated quantum information devices. We here fabricate a photonic crystal cavity around a preselected single silicon-vacancy color center in diamond and demonstrate modification of the emitters internal population dynamics and radiative quantum efficiency. The controlled, room-temperature cavity coupling gives rise to a resonant Purcell enhancement of the zero-phonon transition by a factor of 19, coming along with a 2.5-fold reduction of the emitter's lifetime.