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arXiv:1905.01698 · Physical Review Applied

Tunable Quantum Beat of Single Photons Enabled by Nonlinear Nanophotonics

Qing Li, Anshuman Singh, Xiyuan Lu, John Lawall, Varun Boehm Verma, Richard P. Mirin, Sae Woo Nam, Kartik A. Srinivasan

Published Nov 22, 2019• 12 citations
arXivHTMLPDF

Abstract

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 non-degenerate, 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 beamsplitter, 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.

DOI
10.1103/physrevapplied.12.054054

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