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1 August 2021 Superconducting microbridge single photon detectors with improved temporal response
Milos Petrovic, Lijiong Shen, Shuyu Dong, Filippo Martinelli, Harish Natarajan Swaha Krishnamoorthy, Christian Kurtsiefer, Cesare Soci
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Proceedings Volume 11806, Quantum Nanophotonic Materials, Devices, and Systems 2021; 118060Q (2021) https://doi.org/10.1117/12.2598654
Event: SPIE Nanoscience + Engineering, 2021, San Diego, California, United States
Abstract
We report a single photon detector based on NbTiN microbridges, suitable for operation within telecommunication wavelengths. We observed an excellent signal-to-noise ratio of the readout signal while the corresponding jitter contributed by electrical noise was measured to be less than 10 ps. Routing the current through a parallel electrical connection to set the microbridge back to the superconducting state after photon absorption enabled us to overcome the hysteresis of the state transition. Our approach combines facile fabrication of fast microscale detectors with efficient current redistribution mechanism, enabling prospective applications in quantum photonics which requires accurate estimation of photon arrival events.
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Milos Petrovic, Lijiong Shen, Shuyu Dong, Filippo Martinelli, Harish Natarajan Swaha Krishnamoorthy, Christian Kurtsiefer, and Cesare Soci "Superconducting microbridge single photon detectors with improved temporal response", Proc. SPIE 11806, Quantum Nanophotonic Materials, Devices, and Systems 2021, 118060Q (1 August 2021); https://doi.org/10.1117/12.2598654
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KEYWORDS
Single photon detectors
Superconductors
Sensors
Signal to noise ratio
Single photon
Picosecond phenomena
Quantum efficiency
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