Coupling of a single tin-vacancy center to a photonic crystal cavity in diamond

We demonstrate optical coupling between a single tin-vacancy (SnV) center in diamond and free-standing photonic crystal nanobeam cavity. The cavities are fabricated using quasi-isotropic etching feature experimentally measured quality factors as high ?11 000. investigate the dependence of SnV center's emission by controlling cavity wavelength laser-induced gas desorption technique. Under resonance conditions, we observe an intensity enhancement factor 12 16-fold reduction lifetime. Based on large rate inside cavity, estimate Purcell for zero-phonon line to be 37 efficiency ? factor, 95%. Our work paves way realization quantum devices systems based efficient interfaces color diamond.