Development of Stand-Off Imaging Systems Using Low Cost Plasma Detectors That Work in the GHz to THz Range

Date

2021-05-01

Author

Altan, Hakan
Pavia, Joao Pedro
Ribeiro, Marco
Şahin, Asaf Behzat
Kuşoğlu-Sarıkaya, Cemre

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

264
views

0
downloads

Technologies used to detect mm-wave/Terahertz (THz) radiation range from those that are based on temperature changes, direct/indirect transitions or those that detect through the applied electric field. However, many commercially available detectors have limitations in terms of speed and responsivity and are quite expensive. For these reasons, commercially available indicator lamps which are called glow discharge detectors (GDDs) can be a good alternative since they are low cost and can detect microwave to mm-wave radiation with high sensitivity. These detectors have shown a good response in the mm wave region of the spectrum below ~100GHz, and here we show that their sensitivity even extends far into the THz region. To allow for such a broad frequency sensitivity we studied the detection mechanism behind the glow discharge, and find that it is as a non-local thermal equilibrium plasma whereby it can be simulated using a kinetic approach. The validity of such an approach is shown by obtaining plasma discharge parameters which agree well with experimental observations. The sensitivity of these lamps to frequencies which range from gigahertz to terahertz region allowed us to investigate the possibility of using these lamps in array configurations for low-cost active imaging purposes.

URI

https://link.springer.com/chapter/10.1007/978-94-024-2082-1_19
https://hdl.handle.net/11511/93363

Relation

Terahertz (THz), Mid Infrared (MIR) and Near Infrared (NIR) Technologies for Protection of Critical Infrastructures Against Explosives and CBRN

Collections

Department of Physics, Book / Book chapter

Suggestions

OpenMETU
Core

Development of all digital interferometric closed-loop fiber optic gyroscope with ytterbium doped superfluorescent fiber source Keskin, Hakan; Altan, Hakan; Department of Physics (2023-1-23) In this thesis, the development of a Fiber Optic Gyroscope (FOG) driven by Ytterbium (Yb) doped Amplified Spontaneous Emission (ASE) Source that has broad spectral bandwidth allowing for sensitive measurements is investigated. The first emphasis is given to the development of a Yb-doped ASE. This ASE operates at around 1μm wavelength with broad spectral bandwidth. Different ASE configurations such as single-pass forward (SPF), single-pass backward (SPB), double-pass forward (DPF), and double-pass backward (...
Optimization of a microbolometer pixel for operation in the sub-1 THz region Demirörs, Oytun; Atik, Bahar; Dirican, Emrah; Altan, Hakan; Esentürk, Okan; Ylldlrlm, Mustafa; Akın, Tayfun (2021-01-01) Imaging in the Terahertz (THz) region has drawn attention in recent years, but the nature of the THz frequency regime causes some drawbacks in imaging such as long wavelength, high cost, and low emission levels at room temperature. Because of the high atmospheric absorption of THz waves, fabrication of a microbolometer pixel that works in the sub-1 THz frequency regime is necessary. Large pixel pitches due to longer wavelengths and the resulting higher thermal mass pose a difficult challenge. Due to those l...
Development of view factor correlations for modeling thermal radiation in solid particle solar receivers using CFD-DEM Johnson, Evan; Baker, Derek Keıth; Tarı, İlker (null; 2018-10-05) Radiation heat transfer must be modeled when designing any high temperature solid particle solar receiver or particle-fluid heat exchanger, but computationally efficient radiation models are not currently available in coupled Computational Fluid Dynamics - Discrete Element Method (CFD-DEM) codes, which is the focus of this work. Monte Carlo ray tracing simulations were run to find view factors between particles in packed beds, and correlations were found to estimate both particle-particle and particle-wall ...
Development of high performance long wavelength infrared HgCdTe focal plane arrays Barutçu, Berna; Beşikci, Cengiz; Department of Electrical and Electronics Engineering (2019) This thesis study reports the characterization of long wavelength infrared (LWIR) HgCdTe photovoltaic detectors with the p on n structure and 9.5 μm cut-off wavelength grown by molecular beam epitaxy on CdZnTe substrates and fabricated with different passivation processes. The characterization study was conducted at both pixel and focal plane array (FPA) levels. While the detectors exhibit diffusion dominated dark current at temperatures at and above 130 K under reverse bias voltages typically used in imagi...
Development and characterization of low-cost uncooled infrared sensors for commercial applications Tankut, Firat; Akın, Tayfun; Eminoğlu, Selim; Department of Electrical and Electronics Engineering (2013) This thesis reports the study on the development and characterization of low-cost uncooled microbolometer type infrared detectors, which are fabricated using standard CMOS and MEMS processes. Characterization of the detectors is the first step of developing infrared sensors with better performance. The characterized pixel has a 70 μm pitch and includes 4 serially connected diodes as the detector circuit. Thermal conductance (Gth), temperature sensitivity (TC) and, optical absorption are measured in scope of...

Citation Formats

H. Altan, J. P. Pavia, M. Ribeiro, A. B. Şahin, and C. Kuşoğlu-Sarıkaya, Development of Stand-Off Imaging Systems Using Low Cost Plasma Detectors That Work in the GHz to THz Range. 2021.