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A diamond-confined open microcavity featuring a high quality-factor and a small mode-volume
Journal
Journal of Applied Physics
Volume
131
Number
11
Pages / Article-Number
113102
Abstract
With a highly coherent, optically addressable electron spin, the nitrogen-vacancy (NV) center in diamond is a promising candidate for a node in a quantum network. A resonant microcavity can boost the flux of coherent photons emerging from single NV centers. Here, we present an open Fabry–Pérot microcavity geometry containing a single-crystal diamond membrane, which operates in a regime where the vacuum electric field is strongly confined to the diamond membrane. There is a field anti-node at the diamond–air interface. Despite the presence of surface losses, a finesse of ℱ=11500 was observed. The quality (