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High efficiency nanowire detectors & sub-Kelvin cryogenics


Superconducting nanowire single-photon detectors (SNSPDs) with very high efficiencies (80-90+%) near 1550nm have been recently used for many record-setting experiments in quantum optics, and high data-rate long-range optical communications. Much of the improvement in efficiency is due to the use of tungsten-silicide (WSi) as the superconducting material, which exhibits a higher device yield when fabricated in multi-layer stacks than traditional NbN or NbTiN-based detectors.  In this talk, I will introduce SNSPDs and will describe the latest development of these devices at Photon Spot. The talk will also describe the closed-cycle cryogenic system that is used to cool down and operate these detectors.


Dr. Anant received his Ph.D. in Electrical Engineering from the Massachusetts Institute of Technology.  He founded Photon Spot, Inc. in 2009 to commercialize high-efficiency SNSPDs and provide easy-to-use cryogenics technology to the quantum optics community.  Photon Spot is located in the greater Los Angeles area, near Caltech and the Jet Propulsion Laboratory.