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Conference on Lasers and Electro-Optics

Nitrogen-Vacancy Centers Optically Coupled to Hybrid Microcavities

Paul E. Barclay, Kai‐Mei C. Fu, Charles Santori, Raymond G. Beausoleil

Published Jan 1, 2010• 0 citations
Publisher

Abstract

Optical coupling between nitrogen-vacancy (NV) centers in single-crystal diamond and hybrid gallium phosphide microcavities is demonstrated. NV photoluminescence coupled into microcavities modes with Q > 25000, and mode volumes as small as 18(λ/nGaP)3 are observed.
DOI
10.1364/qels.2010.qwd3

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Resonantly enhanced emission from the zero-phonon line of a diamond nitrogen-vacancy (NV) center in single crystal diamond is demonstrated experimentally using a hybrid whispering gallery mode nanocavity.A 900 nm diameter ring nanocavity formed from gallium phosphide, whose sidewalls extend into a diamond substrate, is tuned onto resonance at a low temperature with the zero-phonon line of a negatively charged NV center implanted near the diamond surface.When the nanocavity is on resonance, the zero-phonon line intensity is enhanced by approximately an order of magnitude, and the spontaneous emission lifetime of the NV is reduced by as much as 18%, corresponding to a 6.3X enhancement of emission in the zero photon line.
Optical nanocavities enable a strong interaction between single photons and single emitters. An appealing application is the construction of a quantum interface for photonic and solid state qubits. Since the material of the solid state qubit is often dierent from the nanocavity, there has been considerable interest in combining the two in a hybrid architecture. We describe our recent development of such a hybrid interface based a Gallium Phosphide photonic crystal nanocavity that is scanned and deterministically coupled to single emitters on a surface. The technique is used to couple the cavity to the nitrogen vacancy center in diamond, an emitter system with optically accessible electron spins and the ability to transfer electronic spin states to nuclear spins.