Abstract
We operate a fiber-based cavity with an inserted diamond membrane containing ensembles of silicon vacancy centers (SiV{}^{-}) at cryogenic temperatures ge 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.
Highlights
Color centers in diamond emerged as promising candidates for a broad field of applications, including quantum sensing [1], quantum communication [2,3,4,5] and quantum memories [6, 7]
Coupling the emitter to a nanophotonic [4, 15, 16], nanofiberbased [17] or open [18,19,20,21,22] optical cavity can be used to both enhance the emission into the zero-phonon line (ZPL) for emitter species with small Debye–Waller factors, like the NV− center, as well as to funnel the emission into a well-collectable optical mode via the Purcell effect
We present an experimental platform to couple color centers incorporated in single crystal diamond (SCD) membranes to a fiber-based microcavity at cryogenic temperatures
Summary
Color centers in diamond emerged as promising candidates for a broad field of applications, including quantum sensing [1], quantum communication [2,3,4,5] and quantum memories [6, 7]. Such applications require stable solid-state emitters with lifetime-limited emission lines, which for several color center species, can be achieved using a high-quality, low-strain crystal host at cryogenic temperatures [8,9,10]. We show spectroscopic measurements at temperatures between 300 K and 4 K, and demonstrate the Purcell enhanced photon emission
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