RSS icon
Twitter icon
Facebook icon
Vimeo icon
YouTube icon

Tunable Quantum Beat of Single Photons Enabled by Nonlinear Nanophotonics

TitleTunable Quantum Beat of Single Photons Enabled by Nonlinear Nanophotonics
Publication TypeJournal Article
Year of Publication2019
AuthorsQ. Li, A. Singh, X. Lu, J. Lawall, V. Verma, R. Mirin, S. Woo Nam, and K. Srinivasan
JournalPhys. Rev. Appl.
Date PublishedNOV 22
Type of ArticleArticle

We demonstrate the tunable quantum beat of single photons through the co-development of core nonlinear nanophotonic technologies for frequency-domain manipulation of quantum states in a common physical platform. Spontaneous four-wave mixing in a nonlinear resonator is used to produce nondegenerate, quantum-correlated photon pairs. One photon from each pair is then frequency shifted, without degradation of photon statistics, using four-wave-mixing Bragg scattering in a second nonlinear resonator. Fine tuning of the applied frequency shift enables tunable quantum interference of the two photons as they are impinged on a beam splitter, with an oscillating signature that depends on their frequency difference. Our work showcases the potential of nonlinear nanophotonic devices as a valuable resource for photonic quantum-information science.