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We developed superconducting nanowire single-photon detectors (SNSPDs) based on 30-nm-wide nanowires, which showed 2.6 % detection efficiency at 5 μm wavelength.
The factors determining the position resolution of continuous crystal based position sensitive scintillation gamma detectors are discussed. The key factors are the position functions which give the relation between the coordinates of the point of interaction (POI) and the responses of the photodetectors reading out of the scintillator. The physical phenomena limiting the position resolution are the...
Several advances in high-detection-efficiency superconducting nanowire single photon detectors (SNSPDs) including multi-layer optical structures and multi-element geometries make them uniquely suited to applications in the short-wave infrared.
In this paper we present a design for a photon-counting optical receiver-based on superconducting NbN nanowire detector arrays-that will be employed in the ground terminal for the NASA Lunar Laser Communications Demonstration. The ground receiver is designed with four, 40 cm apertures, each coupled to a novel multi-mode polarization-maintaining fiber. The receiver is designed to receive a variable-rate...
We demonstrate the potential for 1.85 Mbit/s secure key rates over 101 km of fiber, >100 times faster than previously demonstrated, using the differential phase shift quantum key distribution protocol and superconducting nanowire single-photon detectors.
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