Coupling of silicon-vacancy centers to a single crystal diamond cavity

TL;DR

This paper demonstrates optical coupling of silicon-vacancy centers to single-crystal diamond microdisk cavities, showing potential for integrated diamond photonics networks.

Contribution

It introduces a method to fabricate diamond microdisk cavities with SiV centers and demonstrates their optical coupling with measurable effects.

Findings

Whispering gallery modes with Q ~2200 overlapping SiV ZPL

Lifetime reduction from 1.8 ns to 1.48 ns in the cavity

Successful demonstration of SiV-cavity optical coupling

Abstract

Optical coupling of an ensemble of silicon-vacancy (SiV) centers to single-crystal diamond microdisk cavities is demonstrated. The cavities are fabricated from a single-crystal diamond membrane generated by ion implantation and, electrochemical liftoff followed by homo-epitaxial overgrowth. Whispering gallery modes which spectrally overlap with the zero-phonon line (ZPL) of the SiV centers and exhibit quality factors ~2200 are measured. Lifetime reduction from 1.8 ns to 1.48 ns is observed from SiV centers in the cavity compared to those in the membrane outside the cavity. These results are pivotal in developing diamond integrated photonics networks.