Harmonic mixing using a HTS step-edge Josephson junction at 0.6 THz frequency

Jia Du, Colin Pegrum, Xiang Gao, Andrew R. Weily, Ting Zhang, Yingjie Jay Guo, Cathy P. Foley

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22 Citations (Scopus)
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A high-temperature superconducting (HTS) terahertz (THz) heterodyne mixer based on a thin-film antenna - coupled YBa2Cu3O7-x (YBCO) step-edge Josephson junction is presented. The frequency down-conversion from 0.6 THz to an intermediate frequency (IF) of 2 GHz was achieved using high-order harmonic mixing of a local oscillator (LO), thus removing the need to use a second THz source as the LO pumping source. The DC and RF characteristics of the harmonic mixer as well as the relationship of the IF output power versus the harmonic number were experimentally studied and compared with simulated results. Most of our measurements were made at 40K, but we also observed stable harmonic mixing at 77K which we believe has not been reported previously in HTS junction mixers.
Original languageEnglish
Number of pages5
JournalIEEE Transactions on Applied Superconductivity
Issue number4
Early online date6 Dec 2016
Publication statusPublished - 30 Jun 2017


  • simulation
  • high-temperature superconductor
  • Josephson mixer
  • terahertz mixer
  • harmonic mixing


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