Ultrasensitive proximity Josephson sensor with kinetic inductance readout

F. Giazotto (Corresponding Author), T. T. Heikkilä, G. P. Pepe, Panu Helistö, A. Luukanen, J. P. Pekola

    Research output: Contribution to journalArticleScientificpeer-review

    45 Citations (Scopus)

    Abstract

    We propose a mesoscopic kinetic-inductance radiation detector based on a long superconductor-normal metal-superconductor Josephson junction. The operation of this proximity Josephson sensor relies on large kinetic inductance variations under irradiation due to the exponential temperature dependence of the critical current. Coupled with a dc superconducting quantum interference device readout, the PJS is able to provide a signal to noise (S/N) ratio up to ∼103 in the terahertz regime if operated as calorimeter, while electrical noise equivalent power as low as ∼7×10−20W/√Hz at 200 mK can be achieved in the bolometer operation. The high performance together with the ease of fabrication make this structure attractive as an ultrasensitive cryogenic detector of terahertz electromagnetic radiation.
    Original languageEnglish
    Article number162507
    JournalApplied Physics Letters
    Volume92
    Issue number16
    DOIs
    Publication statusPublished - 2008
    MoE publication typeA1 Journal article-refereed

    Keywords

    • critical currents
    • Josephson effect
    • radiation detection
    • SQUIDs
    • superconductor-normal-superconductor devices

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