Efficient spin-photon interfaces based on color center in diamond

Efficient spin-photon interfaces are essential for applications like quantum repeaters and quantum networks. We employ quantum interference of indistinguishable single photons as a resource for entanglement generation between remote spin systems. We utilize macroscopic solid immersion lenses and optical Fabry-Perot resonators for improved efficiency to realize scalable platforms with high connectivity and high photon generation rates.

Selected references:
A. Sipahigil, et al., „ Quantum interference of single photons from remote nitrogen-vacancy centers in diamond”. Physical Review Letters 108,143601 (2012)