Terahertz frequency metrology based on high-Tc Josephson junctions

J. Chen, H. Horiguchi, H. B. Wang, K. Nakajima, T. Yamashita, P. H. Wu

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Using YBa2Cu3O7/MgO bicrystal Josephson junctions operating between 6-77 K, we have studied their responses to monochromatic electromagnetic radiation from 50 GHz to 4.25 THz. We have obtained direct detections for radiation at 70 K from 50 GHz to 760 GHz and at 40 K from 300 GHz to 3.1 THz. This indicates that fast detectors can be realized to cover the 10:1 frequency band at one operation temperature, and about 100:1 can be covered by operating only one junction at two different temperatures. Both the highest response frequency and the maximum value of the normalized response are shown to be proportional to the ICRN product of the junction, where IC and RN are the critical current and the normal resistance of the junction, respectively.

Original languageEnglish
Pages (from-to)1680-1684
Number of pages5
JournalSuperconductor Science and Technology
Volume15
Issue number12
DOIs
Publication statusPublished - 2002 Dec

ASJC Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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