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Proceedings Paper

Low-cost plasma terahertz heterodyne image detection
Author(s): H. Joseph; A. Abramovich; N. S. Kopeika; D. Rozban; A. Akram
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Paper Abstract

Miniature inexpensive neon indicator lamp plasma glow discharge detectors (GDD) are excellent candidates to serve as room temperature, low cost, terahertz (THz) radiation detectors and as pixels in THz imaging systems. Heterodyne amplification of low power signals via higher power reference beams is very important for THz imaging systems because it permits detection of much lower object beam intensities. An experimental result of 300GHz heterodyne detection by a single commercial GDD device costing about 30 cents is presented here. In heterodyne image detection a picture is taken of interference fringes or a hologram deriving from a coherent reference wave and a coherent wave reflected from or transmitted through an object. Transmission with in-line or zero angles between those two waves is important to widen the fringes. The GDD detector is transparent, so that it's possible to receive radiation from both sides, at 0 and 180 degree. This permit receiving the wave reflected from or transmitted through an object at 0 degree and the reference wave from the opposite direction at 180 degree. Such interference fringe widening can permit heterodyne direct imaging of the object instead of imaging the interference pattern.

Paper Details

Date Published: 28 August 2010
PDF: 10 pages
Proc. SPIE 7818, Adaptive Coded Aperture Imaging, Non-Imaging, and Unconventional Imaging Sensor Systems II, 78180V (28 August 2010); doi: 10.1117/12.858811
Show Author Affiliations
H. Joseph, Ben-Gurion Univ. of the Negev (Israel)
Ariel Univ. Ctr. of Samaria (Israel)
A. Abramovich, Ariel Univ. Ctr. of Samaria (Israel)
N. S. Kopeika, Ben-Gurion Univ. of the Negev (Israel)
D. Rozban, Ben-Gurion Univ. of the Negev (Israel)
Ariel Univ. Ctr. of Samaria (Israel)
A. Akram, Ben-Gurion Univ. of the Negev (Israel)
Ariel Univ. Ctr. of Samaria (Israel)


Published in SPIE Proceedings Vol. 7818:
Adaptive Coded Aperture Imaging, Non-Imaging, and Unconventional Imaging Sensor Systems II
Jean J. Dolne; Stanley Rogers; Thomas J. Karr; David P. Casasent; Victor L. Gamiz, Editor(s)

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