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Abstract
Generally, glow-discharge detectors (GDD), acting on miniature neon indicator lamps, and Schottky diode detectors serve as efficient, fast, and room-temperature millimeter wave (MMW)/THz detectors. Previous studies on GDD implemented a repetition of terahertz sources, and low-power radiation, and showed good results in terms of detection, responsivity, and noise-equivalent power. This paper presents a comparison between a detector based on a GDD lamp and a Schottky diode detector for the detection of a high-power single pulse. With this comparison, we touch upon two GDD detection methods, the visual light emitting from the GDD and the electrical current of the GDD detector. Results showed better response time and better sensitivity for the GDD detection method compared to with the Schottky diode.
Highlights
Terahertz (THz) radiation and millimeter waves (MMW) have attained widespread application in package inspection, quality control, nondestructive testing [1], medicine [2], communications [3], and spectroscopic characterization [4]
The response time of the plasma inside the glow-discharge detector (GDD) was in the order of picoseconds, which explains why the yellow graph, which represents the optical method for the GDD, had the shortest response time
This paper has presented experiment results of high-power MMW/THz pulse detection using electronic and optical GDD detectors
Summary
Terahertz (THz) radiation and millimeter waves (MMW) have attained widespread application in package inspection, quality control, nondestructive testing [1], medicine [2], communications [3], and spectroscopic characterization [4]. The preference to use THz and MMW is that there is no ionization hazard [5], penetration through dielectric materials is reasonably good, and the atmospheric scattering of MMW and THz radiation is relatively low [6] This has led to the development of low-cost, fast, highly sensitive, compact, and room-temperature detectors. Schottky diodes are fast and have lower noise-equivalent power (NEP) [10] They are not intended for high-power THz pulses, are much less sensitive at higher frequencies of the THz band, and require much more local oscillator (LO) power as compared with currently convenient tuneable LO sources [11]. Experiment results detected a single pulse of 0.1 THz and 5 KW using
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