Pushing the operating range of SIS mixers into the THz regime

TM Klapwijk*, P Dieleman, MWM de Graauw

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    4 Citations (Scopus)

    Abstract

    In recent years, responding to the need of the astronomical community, superconductor-insulator-superconductor (SIS) mixers have been developed to operate at THz frequencies. Best results are obtained by using niobium-based tunnel junctions with well-matched low-loss normal metal striplines, which are found to be less lossy than niobium striplines operated above the gap-frequency of niobium (700 GHz). Niobiumnitride tunnel junctions with a magnesiumoxide tunnel barrier, although having reasonable quality current-voltage characteristics, have been found to be unsuitable due to excess shot noise resulting from pinholes in the barrier.

    Original languageEnglish
    Title of host publicationAPPLIED SUPERCONDUCTIVITY 1997, VOLS 1 AND 2
    EditorsH Rogalla, DHA Blank
    Place of PublicationBRISTOL
    PublisherIOP PUBLISHING LTD
    Pages367-372
    Number of pages6
    ISBN (Print)0-7503-0487-1
    Publication statusPublished - 1997
    Event3rd European Conference on Applied Superconductivity (EUCAS 1997) - , Netherlands
    Duration: 30-Jun-19973-Jul-1997

    Publication series

    NameINSTITUTE OF PHYSICS CONFERENCE SERIES
    PublisherIOP PUBLISHING LTD
    ISSN (Print)0951-3248

    Other

    Other3rd European Conference on Applied Superconductivity (EUCAS 1997)
    CountryNetherlands
    Period30/06/199703/07/1997

    Keywords

    • GAP FREQUENCY
    • TUNNEL

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