Heterodyne detection at 300 GHz using glow discharge detectors with efficient quasi-optical design

Avihai Aharon, Daniel Rozban, Assaf Levanon, A. Abramovich, N. S. Kopeika

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

A miniature neon indicator lamp, also known as a Glow Discharge Detector (GDD), costing about 50 cents, was found to be an excellent room temperature THz radiation detector. A proof of concept of 300 GHz heterodyne detection using GDD is demonstrated in this paper. Furthermore, a comparison to direct detection was carried-out and polarization effects on heterodyne detection were investigated. Preliminary results at 300 GHz showed better sensitivity by a factor of 20 with only 56 microwatt local oscillator power using heterodyne compared to direct detection. Further improvement of the detection sensitivity can be achieved if the Local Oscillator (LO) power (Plo) is increased. Effects of orthogonal polarizations of signal and local oscillator powers on heterodyne sensitivity were found to be surprisingly weak. More efficient quasi optical design for heterodyne detection is presented in this study, experimental results showed above 50% better performance compared to conventional ones.

Original languageEnglish
Title of host publicationTerahertz Physics, Devices, and Systems VII
Subtitle of host publicationAdvanced Applications in Industry and Defense
DOIs
StatePublished - 8 Aug 2013
EventTerahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense - Baltimore, MD, United States
Duration: 29 Apr 201330 Apr 2013

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume8716
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceTerahertz Physics, Devices, and Systems VII: Advanced Applications in Industry and Defense
Country/TerritoryUnited States
CityBaltimore, MD
Period29/04/1330/04/13

Keywords

  • Down-conversion
  • Heterodyne
  • Plasma
  • THz
  • THz detector

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