Affiliation:
1. Research Institute of Superconductor Electronics, Nanjing University, Nanjing 210093, China
Abstract
In this Letter, we report on pattern engineering in superconducting microstrips to achieve a fast and efficient detection of a single-photon over a large detection area. The proposed detector is composed of hole-patterned superconductor microstrips fabricated with a 5-nm-thick amorphous molybdenum silicide film. It exhibits a saturated internal detection efficiency at 1550 nm with a negligible dark count rate and a recovery time of 9 ns with a large detection area (50 × 50 μm2). The simulation reveals that the holes patterned in the superconductor microstrip stimulate the nucleation of the vortex, which constitutes a major key to achieving the efficient detection of photons. This work paves the way for the facile and prolonged regulation of vortex nucleation in superconductors, which shows promise for developing high-performance large-area superconductor single-photon detectors.
Funder
National Key Research and Development Program of China
Natural Science Foundation of Jiangsu Province
National Natural Science Foundation of China
Key-Area Research and Development Program of Guangdong Province
Subject
Physics and Astronomy (miscellaneous)
Cited by
2 articles.
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