Applied Physics Seminar
Alp Sipahigil received the B.S. degree in Physics and Electrical Engineering from Bogazici University in 2010. He is currently a Ph.D. candidate in the Department of Physics, Harvard University, working on optical spectroscopy, quantum optics and nanophotonics with Prof. Mikhail Lukin.
Efficient interfaces between photons and quantum emitters form the basis for quantum networks and enable optical nonlinearities at the single-photon level. I will discuss recent experiments[1] where silicon-vacancy (SiV) color centers are coupled to one dimensional diamond nanophotonic devices to achieve strong light-matter interactions. 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.
[1] A. Sipahigil et al., http://arxiv.org/abs/1608.05147 (2016).