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Quantum Photonics in the Frequency Domain

Alex Gaeta

David M. Rickey Professor

Department of Applied Physics and Applied Mathematics

Columbia University

Zoom Virtual Setting

Abstract: Quantum frequency conversion is the process by which the wavelength of a light field is converted to another wavelength while still fully maintaining its quantum state.  We describe our recent research that utilizes the nonlinear optical process of four-wave mixing to perform ultralow noise quantum frequency conversion with efficiencies approaching 100%.  We also show how this nonlinear process can be used to realize other novel quantum phenomena in the frequency domain including Hong-Ou-Mandel interference, near-deterministic single-photon generation, single-photon Ramsey interference, and temporal magnification of single-photon pulses.

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Bio: Gaeta received his Ph.D. in 1991 in Optics from the Â鶹´«Ã½.  He joined the faculty in the Department of Applied Physics and Applied Mathematics at Columbia University in 2015, where he is the David M. Rickey Professor.  Prior to  this, he was a professor in the School of Applied and Engineering Physics at Cornell University for 23 years.  He has published more than 250 papers in quantum and nonlinear optics. He co-founded PicoLuz, Inc. and was the founding Editor-in-Chief of Optica.  He is a Fellow of the OSA, APS, and IEEE, is a Thomson Reuters Highly Cited Researcher, and was awarded the 2019 Charles H. Townes Medal from the OSA.