Indistinguishable photons from separated silicon-vacancy centers in diamond

Phys Rev Lett. 2014 Sep 12;113(11):113602. doi: 10.1103/PhysRevLett.113.113602. Epub 2014 Sep 11.


We demonstrate that silicon-vacancy (SiV) centers in diamond can be used to efficiently generate coherent optical photons with excellent spectral properties. We show that these features are due to the inversion symmetry associated with SiV centers. The generation of indistinguishable single photons from separated emitters at 5 K is demonstrated in a Hong-Ou-Mandel interference experiment. Prospects for realizing efficient quantum network nodes using SiV centers are discussed.