We operate a fiber-based cavity with an inserted diamond membrane containing ensembles of silicon vacancy centers (SiV ⁻ - ) at cryogenic temperatures ≥ 4~ ≥ 4 K. The setup, sample fabrication and spectroscopic characterization are described, together with a demonstration of the cavity influence by the Purcell effect. This paves the way towards solid-state qubits coupled to optical interfaces as long-lived quantum memories.
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Salz et al. (2020) studied this question.
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