Deterministic coupling of a single silicon-vacancy color center to a   photonic crystal cavity in diamond
  Deterministic coupling of single solid-state emitters to nanocavities is the key for integrated quantum information devices. We here fabricate a photonic crystal cavity around a preselected single silicon-vacancy color center in diamond and demonstrate modification of the emitters internal population dynamics and radiative quantum efficiency. The controlled, room-temperature cavity coupling gives rise to a resonant Purcell enhancement of the zero-phonon transition by a factor of 19, coming along with a 2.5-fold reduction of the emitter's lifetime. 
Janine Riedrich-M\"oller, Carsten Arend, Christoph Pauly, Frank   M\"ucklich, Martin Fischer, Stefan Gsell, Matthias Schreck...
quant-ph physics.optics