Terahertz and millimetre wave imaging with a broadband josephson detector working above 77 K

Research output: Contribution to journalArticlepeer-review

Authors

  • Jia Du
  • A. D. Hellicar
  • L. Li
  • J. C. MacFarlane
  • K. E. Leslie
  • C. P. Foley

Colleges, School and Institutes

External organisations

  • CSIrO
  • CSIRO Ict Centre

Abstract

A high-T c superconducting (HTS) broadband Josephson detector has been developed and applied to millimetre wave (mm-wave) and terahertz (THz) imaging. The detector is based on a YBa 2Cu 3O 7-x (YBCO) step-edge Josephson junction, which is coupled to a thin-film log-periodic antenna, designed for operation at 200-600 GHz, and a hemispheric silicon lens. The junction parameters have been optimised to achieve a high I cR n value so that the detector responds well to the specified frequencies at liquid nitrogen temperature (77 K). Images at ∼200 GHz and ∼600 GHz were acquired with the same detector; each demonstrated their unique properties. The results demonstrate the potential of achieving a cheaper, compact and portable multi-spectral imager based on a HTS detector.

Details

Original languageEnglish
Pages (from-to)681-690
Number of pages10
JournalJournal of Infrared, Millimeter, and Terahertz Waves
Volume32
Issue number5
Publication statusPublished - 1 May 2011

Keywords

  • Imaging, Josephson junction, Millimetre wave, Superconducting detector, Terahertz