Cavity-enhanced Raman emission from a single color center in a solid

TL;DR

This paper demonstrates cavity-enhanced Raman emission from a single silicon-vacancy center in diamond, achieving a wide tuning range and improved emission efficiency, advancing solid-state quantum photonics.

Contribution

It introduces a monolithic diamond photonic crystal cavity that enhances and tunes Raman emission from a single defect in diamond, surpassing previous spectral limitations.

Findings

Achieved 100 GHz Raman emission tuning range.

Suppressed phonon-induced spontaneous emission.

Enabled potential for photon-mediated quantum interactions.

Abstract

We demonstrate cavity-enhanced Raman emission from a single atomic defect in a solid. Our platform is a single silicon-vacancy center in diamond coupled with a monolithic diamond photonic crystal cavity. The cavity enables an unprecedented frequency tuning range of the Raman emission (100 GHz) that significantly exceeds the spectral inhomogeneity of silicon-vacancy centers in diamond nanostructures. We also show that the cavity selectively suppresses the phonon-induced spontaneous emission that degrades the efficiency of Raman photon generation. Our results pave the way towards photon-mediated many-body interactions between solid-state quantum emitters in a nanophotonic platform.