SAMOP 2023 – scientific programme
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QI: Fachverband Quanteninformation
QI 24: Integrated Photonics II (joint session Q/QI)
QI 24.3: Talk
Wednesday, March 8, 2023, 17:30–17:45, A320
Waveguide-Intergrated Superconducting Nanowire Avalanche Single-Photon Detectors — •Connor A. Graham-Scott1,2,3, Matthias Häußler1,2,3, Mikhail Yu. Mikhailov4, and Carsten Schuck1,2,3 — 1University of Münster, Physics Institute, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2CeNTech - Center for NanoTechnology, Heisenbergstr. 11, 48149 Münster, Germany — 3Center for Soft Nanoscience (SoN), Busso-Peus-Straße 10, 48149 Münster, Germany — 4B. Verkin Institute for Low Temperature Physics and Engineering of the National Academy of Sciences of Ukraine, 61103 Kharkiv, Ukraine
Superconducting nanowire single-photon detectors (SNSPDs) are of great interest for applications in quantum communication, quantum information and quantum computing. A drawback of SNSPDs, however, is the low signal-to-noise ratio of their electrical output signals, resulting from operating at bias currents below the critical current of the ultra-thin superconducting nanowires.
High signal-to-noise ratio can be achieved by implementing a superconducting nanowire avalanche single photon detector (SNAP) architecture that connects several SNSPD elements in parallel, thus realising operation at high bias current and successive switching of elements upon photon absorption and current redistribution.
Here we show the design, fabrication and measurements of a successive-avalanche architecture SNAP with amorphous molybdenum silicide nanowires integrated with nanophotonic waveguides for on-chip single-photon counting with ultra-high signal-to-noise ratios.