An integrated diamond nanophotonics platform for quantum-optical networks

• Autores: A. Sipahigil, R. E. Evans, D. D. Sukachev
• Localización: Science, ISSN 0036-8075, Vol. 354, Nº 6314, 2016, págs. 847-850
• Idioma: inglés
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• Resumen

  • Efficient interfaces between photons and quantum emitters form the basis for quantum networks and enable optical nonlinearities at the single-photon level. We demonstrate an integrated platform for scalable quantum nanophotonics based on silicon-vacancy (SiV) color centers coupled to diamond nanodevices. By placing SiV centers inside diamond photonic crystal cavities, we realize a quantum-optical switch controlled by a single color center. We control the switch using SiV metastable states and observe optical switching at the single-photon level. Raman transitions are used to realize a single-photon source with a tunable frequency and bandwidth in a diamond waveguide. By measuring intensity correlations of indistinguishable Raman photons emitted into a single waveguide, we observe a quantum interference effect resulting from the superradiant emission of two entangled SiV centers.