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Integrated photonics for high-performance quantum sources and detectors

Abstract: Integrated photonics can greatly reduce the size, weight and power (SWaP) of optical assemblies, and also improve functionality and utility of quantum photonic sources and detectors, which may, in turn, benefit large-scale deployment and adoption of photonic devices for practical quantum communications and sensing.  We report on good performance in entangled photon-pair generation using spontaneous four-wave mixing (SFWM) in silicon photonic micro-resonators, and using spontaneous parametric down-conversion (SPDC) in periodically-poled thin-film lithium niobate waveguides. We demonstrate gating and switching of single photons using integrated electro-optic modulators. Using superconducting nanowire single-photon detectors, we demonstrate  capture of ultra-high bandwidth (>100 GHz) optical modulated signals at ultra-low received average power (below -100 dBm), a new milestone in optical oscilloscopy.

Bio: Shayan Mookherjea received the BS degree with honors from Caltech, the SM degree from MIT, and the PhD from Caltech in Electrical Engineering with a minor in Physics. He is a Professor of Electrical and Computer Engineering at the University of California, San Diego (UCSD) and  a Visiting Professor with the Electrical Engineering department at IIT Madras (India). He has received the Wilts Prize, Hellman Faculty Fellow, NSF CAREER grant, OSA Fellow, and the GIAN and VAJRA initiatives of the Govt. of India. He leads the Micro/Nano-Photonics Group at UCSD (

Host: Joyce Poon
Event series  CQIQC Seminars