Chip-based microcavities coupled to NV centers in single crystal diamond

TL;DR

This paper demonstrates the optical coupling of nitrogen vacancy centers in single-crystal diamond to a chip-based microcavity fabricated from a hybrid gallium phosphide and diamond system, achieving high-quality whispering gallery mode resonances.

Contribution

It introduces a novel hybrid material system for microcavities that effectively couples to NV centers in diamond, enabling on-chip quantum photonics applications.

Findings

Achieved whispering gallery mode resonances with Q > 25000

Demonstrated optical coupling of NV centers to microcavities

Fabricated microcavities from hybrid gallium phosphide and diamond

Abstract

Optical coupling of nitrogen vacancy centers in single-crystal diamond to an on-chip microcavity is demonstrated. The microcavity is fabricated from a hybrid gallium phosphide and diamond material system, and supports whispering gallery mode resonances with spectrometer resolution limited Q > 25000.