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Superconductors Strengthen Single-Photon Detectors

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Marie Freebody, Contributing Editor, [email protected]

Single-photon detectors (SPDs) underpin a host of new areas in optical physics, one of which is quantum cryptography – or, more correctly, quantum key distribution (QKD) – an application that is already on the fringes of commercial exploitation. Recent advances in detector technologies have enabled secure quantum transmission over record distances, but the impact of new detector technologies goes beyond that of the quantum information world. SPDs are also poised to significantly affect existing optical fields such as astronomy, laser ranging, remote sensing and biomedical...Read full article

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    Published: March 2011
    Glossary
    astronomy
    The scientific observation of celestial radiation that has reached the vicinity of Earth, and the interpretation of these observations to determine the characteristics of the extraterrestrial bodies and phenomena that have emitted the radiation.
    metrology
    Metrology is the science and practice of measurement. It encompasses the theoretical and practical aspects of measurement, including the development of measurement standards, techniques, and instruments, as well as the application of measurement principles in various fields. The primary objectives of metrology are to ensure accuracy, reliability, and consistency in measurements and to establish traceability to recognized standards. Metrology plays a crucial role in science, industry,...
    quantum key distribution
    Quantum key distribution (QKD) is a method of secure communication that utilizes principles from quantum mechanics to establish a shared secret key between two parties, typically referred to as Alice and Bob, while detecting any potential eavesdropping attempts by a third party, commonly known as Eve. The fundamental principle behind QKD is the use of quantum properties, such as the superposition principle and the no-cloning theorem, to enable the distribution of cryptographic keys in a...
    remote sensing
    Remote sensing is a method of data collection and observation where information about objects, areas, or phenomena on Earth's surface is gathered from a distance, typically using sensors onboard satellites, aircraft, drones, or other platforms. This technique enables the monitoring and analysis of Earth's surface and atmosphere without direct physical contact. Remote sensing systems capture electromagnetic radiation (such as visible light, infrared, microwave, or radio waves) reflected or...
    astronomyavalanche photodiodesBasic ScienceBienfangbiomedical imagingBullercamerasColoradoCommunicationscontinuous-variable schemesdark countsDARPAEdinburghElectron and Optical Physics DivisionFeaturesGerald BullerGol’tsmanHadfieldHeriot-Watt UniversityImagingindustrialJoshua Bienfanglaser rangingMarie FreebodymetrologyMoscowMoscow State Pedagogical UniversityNamNASANature PhotonicsNew YorkNISTOptics LettersphotomultipliersQKDquantum cryptographyquantum key distributionQuantum Telecommunications groupremote sensingRobert HadfieldRussiaSae Woo NamSchool of Engineering and Physical SciencesSensors & Detectorssingle photon avalanche diodeSingle-photon detectorsSNSPDSobolewskiSPADSPDsStanford Universitysuperconducting nanowire single photon detectorsuperconducting single-photon detectorsTest & MeasurementUKUK Silicon Photonics consortiumUniversity of RochesterUS

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