High sensitivity high Tc superconducting Josephson junction antenna for 200 GHz detection

E. Holdengreber, A. G. Moshe, M. Mizrahi, V. Khavkin, S. E. Schacham, E. Farber

Research output: Contribution to journalArticlepeer-review

Abstract

A high sensitivity rounded bow-tie antenna was optimized based on electromagnetic simulations. The bicrystal Josephson junction detector with a thin layer of YBCO was located exactly at the bicrystal misorientation point at the center of the antenna. The Au antenna was fabricated on an (100) MgO bicrystal substrate. In the presence of 200 GHz RF radiation, a noise equivalent power (NEP) of around 6×10 12 W Hz−1/2 was measured, with a voltage sensitivity, n(V), of 30 dB with the detector at 60 K. Even though no coupling lens was used, these results are as good as those reported in systems in which the impinging radiation was focused with lenses over the detectors. Thus, important simplification of the system was obtained without loss of sensitivity.

Original languageEnglish
Pages (from-to)193-203
Number of pages11
JournalJournal of Electromagnetic Waves and Applications
Volume33
Issue number2
DOIs
StatePublished - 22 Jan 2019

Keywords

  • Josephson junction applications
  • Superconducting antenna
  • planar antenna
  • submillimeter wave antenna
  • terahertz radiation detectors

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