Single-Photon Switching and Entanglement of Solid-State Qubits in an Integrated Nanophotonic System

Alp Sipahigil, Ruffin E. Evans, Denis D. Sukachev, Michael J. Burek, Johannes Borregaard, Mihir K. Bhaskar, C. T. Nguyen, Jose L Pacheco, Haig A. Atikian, Charles Meuwly

Abstract

Efficient interfaces between photons and quantum emitters form the basis for quantum networks and enable nonlinear optical devices operating at the single-photon level. We demonstrate an integrated platform for scalable quantum nanophotonics based on silicon-vacancy (SiV) color centers coupled to nanoscale diamond devices. 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 orbital states and verify optical switching at the single-photon level by using photon correlation measurements. We use Raman transitions to realize a single-photon source with a tunable frequency and bandwidth in a diamond waveguide. Finally, we create entanglement between two SiV centers by detecting indistinguishable Raman photons emitted into a single waveguide. Entanglement is verified using a novel superradiant feature observed in photon correlation measurements, paving the way for the realization of quantum networks.

Locations

• arXiv (Cornell University) - View - PDF