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Superconducting devices offer the potential to perform at speeds and detection efficiencies higher than what is possible using conventional technologies (such as semiconducting avalanche photodiodes and photomultiplier tubs) for wavelengths from the ultraviolet to the mid-infrared. As a result, there has been increasing interest in using superconducting optical photon detectors in a variety of applications...
There is increasing interest in using superconducting optical photon detectors in a variety of applications. These applications require detectors that have extremely low dark count rates, high count rates, and high quantum efficiency. I will describe our work on two types of superconducting detectors, the Superconducting Nanowire Single Photon Detector (SNSPD or nSSPD) and superconducting Transition-Edge...
We measure a peak system detection efficiency (SDE) of 87.7 ± 0.5 % and a polarization dependence of less than 2 % using vertically-stacked superconducting nanowire single-photon detectors connected electrically in parallel.
We report on a fiber-coupled eight-channel single-photon-detection system employing superconducting nanowire single-photon detectors (SNSPDs) based on amorphous tungsten silicide (WSi) with system detection efficiency ranging from 81 to 89 % at 1550 nm wavelength.
Uptime, operating cost and serviceability are the major concerns for data center cooling. This paper will describe an air and liquid cooling system that is optimized for data centers and does not involve major infrastructure changes. This system uses a minimum heat exchanger volume and coolant volume in order to simplify the installation at the server and data center level. The goal is to reduce chiller...
YBa2Cu3O7-x (YBCO) thick films were grown by hybrid liquid phase epitaxy (HLPE) on (001) SrTiO3 (STO) substrates. With introduction of Au into the film via diffusion from a 5 mol.% 100 nm thick Au-doped STO buffer, self-field Jcs at 77 K of ~ 2.4 MAcm-2 and Ics up to 700 A/cm-width of were achieved. The Jc value is virtually independent on thickness and growth rates are extremely high ( ~ 1 mum/min)...
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