Shot noise in NbN SIS junctions suitable for THz radiation detection

P Dieleman*, H van de Stadt, TM Klapwijk, M Schicke, KH Gundlach

*Bijbehorende auteur voor dit werk

    OnderzoeksoutputAcademicpeer review

    1 Citaat (Scopus)

    Samenvatting

    We study the behavior of NbN SIS junctions as radiation detectors with emphasis on the shot noise generated at voltages below the gap voltage. The intrinsically large subgap current of NbN junctions is carried by pinholes with a conduction attributed to multiple Andreev reflection, leading to transported charges q much greater than e. Using this charge enhancement mechanism we explain the junction shot noise characteristics in the unpumped case as well as in the pumped case. The measured mixer noise temperature in the pumped case is more than twice that calculated with standard Tucker theory. The measured double side band noise temperatures are 1450 K at 600 GHz and 2800 K at 950 GHz.

    Originele taal-2English
    TitelAPPLIED SUPERCONDUCTIVITY 1997, VOLS 1 AND 2
    RedacteurenH Rogalla, DHA Blank
    Plaats van productieBRISTOL
    UitgeverijIOP PUBLISHING LTD
    Pagina's421-424
    Aantal pagina's4
    ISBN van geprinte versie0-7503-0487-1
    StatusPublished - 1997
    Evenement3rd European Conference on Applied Superconductivity (EUCAS 1997) - , Netherlands
    Duur: 30-jun-19973-jul-1997

    Publicatie series

    NaamINSTITUTE OF PHYSICS CONFERENCE SERIES
    UitgeverijIOP PUBLISHING LTD
    ISSN van geprinte versie0951-3248

    Other

    Other3rd European Conference on Applied Superconductivity (EUCAS 1997)
    LandNetherlands
    Periode30/06/199703/07/1997

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