Broadband polarization insensitivity and high detection efficiency in high-fill-factor superconducting microwire single-photon detectors

Abstract

Single-photon detection via absorption in current-biased nanoscale superconducting structures has become a preferred technology in quantum optics and related fields. Single-mode fiber packaged devices have seen new records set in detection efficiency, timing jitter, recovery times, and largest sustainable count rates. The popular approaches to decreasing polarization sensitivity have thus far been limited to introduction of geometrically symmetric nanowire meanders, such as spirals and fractals, in the active area. The constraints on bending radii, and by extension, fill factors, in such designs limits their maximum efficiency. The discovery of single-photon sensitivity in micrometer-scale superconducting wires enables novel meander patterns with no effective upper limit on fill factor. This work demonstrates simultaneous low-polarization sensitivity ($1.02\pm 0.008$) and high detection efficiency ($>91.8\%$ with $67\%$ confidence at $2\times 10^5$ counts per second) across a $40$ nm bandwidth centered at 1550 nm in 0.51 $\mu \text{m}$ wide microwire devices made of silicon-rich tungsten silicide, with a $0.91$ fill factor in the active area. These devices boasted efficiencies of $96.5-96.9\%\pm 0.5\%$ at $1\times 10^5$ counts per second for 1550 nm light.

arXiv comment18 pages, 13 figures (including supplementary document) Added citations in replacement version

References in corpus (34)

• A strong loophole-free test of local realism
• Demonstrating sub-3 ps temporal resolution in a superconducting nanowire single-photon detector
• Sending-or-Not-Sending with Independent Lasers: Secure Twin-Field Quantum Key Distribution Over 509 km
• On-Chip Detection of Entangled Photons by Scalable Integration of Single-Photon Detectors
• Geometry-dependent critical currents in superconducting nanocircuits
• Integrating quantum key distribution with classical communications in backbone fiber network
• Unconditional violation of the shot noise limit in photonic quantum metrology
• Detecting Infrared Single Photons with Near-Unity System Detection Efficiency
• Distributed Quantum Sensing Using Continuous-Variable Multipartite Entanglement
• Detecting Dark Matter with Superconducting Nanowires
• Optical Properties of Superconducting Nanowire Single-Photon Detectors
• Optical Interferometry with Quantum Networks
• Detecting single infrared photons toward optimal system detection efficiency
• Quantum teleportation over 100 km of fiber using highly-efficient superconducting nanowire single photon detectors
• Device-independent Randomness Expansion with Entangled Photons
• A multiplexed light-matter interface for fibre-based quantum networks
• Efficient and pure femtosecond-pulse-length source of polarization-entangled photons
• Superconducting nanowire single photon detector at 532 nm and demonstration in satellite laser ranging
• Large-area microwire MoSi single-photon detectors at 1550 nm wavelength
• Quantum key distribution over a 72 dB channel loss using ultralow dark count superconducting single-photon detectors
• Superconducting microwire detectors with single-photon sensitivity in the near-infrared
• A telecom-wavelength atomic quantum memory in optical fiber for heralded polarization qubits
• Superconducting microstrip single-photon detector with system detection efficiency over 90% at 1550 nm
• Different single photon response of wide and narrow superconducting MoSi strips
• Design of broadband high-efficiency superconducting-nanowire single photon detectors
• Einstein-Podolsky-Rosen steering in Gaussian weighted graph states
• Fractal superconducting nanowires detect infrared single photons with 84% system detection efficiency, 1.02 polarization sensitivity, and 20.8 ps timing resolution
• Design of polarization-insensitive superconducting single photon detectors with high-index dielectrics
• Detection Efficiency of a Spiral-Nanowire Superconducting Single-Photon Detector
• Enhancing the Performance of Superconducting Nanowire-Based Detectors with High-Filling Factor by Using Variable Thickness
• High Dynamic Range Externally Time-gated Photon Counting Optical Time-domain Reflectometry
• Physical properties of amorphous molybdenum silicide films for single photon detectors
• Single-shot quantum memory advantage in the simulation of stochastic processes
• PHIDL: Python CAD layout and geometry creation for nanolithography

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• A vapor-cavity-QED system for quantum computation and communication