Frequency detection of focused sub-THz waves using a high-Tc Josephson junction

T. Miyadera, I. Kawayama, T. Kiwa, K. Tsukada, M. Tonouchi

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


We have proposed a new type of frequency detection system of sub-terahertz electromagnetic waves using a photomixing technique and a Josephson junction detector. The photomixer illuminated by two lasers with different wavelengths generates coherent electromagnetic waves that include a frequency component corresponding to the frequency difference of the two lasers. The generated electromagnetic waves were radiated from a horn antenna and focused to the Josephson junction detector with Si lens. The high-Tc Josephson junction operates as a frequency detector for electromagnetic waves. Using this system, we observed the Shapiro steps of 188 μV that correspond to the frequencies of 90.8 GHz.

Original languageEnglish
Pages (from-to)1726-1730
Number of pages5
JournalPhysica C: Superconductivity and its applications
Issue numberII
Publication statusPublished - 2005
EventProceedings of the 17th Internatioanl Symposium on Superconductivity (ISS 2004) Advances in Superconductivity -
Duration: Nov 23 2004Nov 25 2004


  • Josephson junction
  • Photomixing
  • Shapiro step

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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