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Graphene-Based Josephson Junction Enables Single-Photon Detection

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JOEL WILLIAMS, ASSOCIATE EDITOR
[email protected]

CAMBRIDGE, Mass., May 20, 2021 — Researchers at Raytheon BBN Technologies developed a method of single-photon detection based on a Josephson junction. The advancement, which is poised to spur development in sensor, communication, and quantum processing technology, features the Josephson junction in a role that is analogous to that of a transistor in electronic systems, said Kin Chung Fong, a quantum information processing scientist at Raytheon BBN Technologies. Fong is also a research associate at Harvard University. The work builds on previous research into a microwave radiation detector 100,000× more sensitive...Read full article

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    Published: May 2021
    Glossary
    quantum
    The term quantum refers to the fundamental unit or discrete amount of a physical quantity involved in interactions at the atomic and subatomic scales. It originates from quantum theory, a branch of physics that emerged in the early 20th century to explain phenomena observed on very small scales, where classical physics fails to provide accurate explanations. In the context of quantum theory, several key concepts are associated with the term quantum: Quantum mechanics: This is the branch of...
    graphene
    Graphene is a two-dimensional allotrope of carbon consisting of a single layer of carbon atoms arranged in a hexagonal lattice pattern. It is the basic building block of other carbon-based materials such as graphite, carbon nanotubes, and fullerenes (e.g., buckyballs). Graphene has garnered significant attention due to its remarkable properties, making it one of the most studied materials in the field of nanotechnology. Key properties of graphene include: Two-dimensional structure:...
    superconductor
    A metal, alloy or compound that loses its electrical resistance at temperatures below a certain transition temperature referred to as Tc. High-temperature superconductors occur near 130 K, while low-temperature superconductors have Tc in the range of 4 to 18 K.
    Research & TechnologySensors & Detectorsquantumquantum computinggraphenephoton detectorsingle photon detectorRaytheonRaytheon BBN TechnologiesRaytheon Intelligence & SpaceRaytheon Intelligence and SpacescienceJosephson junctionsuperconductor

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