Antenna-Coupled Titanium Microbolometers: Application for Precise Control of Radiation Patterns in Terahertz Time-Domain Systems

An ability of lensless titanium-based antenna coupled microbolometers (Ti-μbolometers) operating at room temperature to monitor precisely radiation patterns in terahertz time-domain spectroscopy (THz-TDS) systems are demonstrated. To provide comprehensive picture, two different THz-TDS systems and T...

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Bibliographic Details
Published in:Sensors (Basel, Switzerland) Switzerland), 2021-05, Vol.21 (10), p.3510
Main Authors: Qi, Liang, Minkevičius, Linas, Urbanowicz, Andrzej, Švigelj, Andrej, Grigelionis, Ignas, Kašalynas, Irmantas, Trontelj, Janez, Valušis, Gintaras
Format: Article
Language:English
Subjects:
Antenna radiation patterns
Antennas
Arrays
Broadband
Design
Dipole antennas
Emitters
Lasers
Log periodic antennas
Narrowband
Power
precise THz mode control
Propagation
Radiation
radiation pattern monitoring
Room temperature
Sensors
Silicon nitride
Spectrum analysis
THz time-domain spectroscopy systems
Titanium
titanium-based microbolometeric sensors
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Summary:An ability of lensless titanium-based antenna coupled microbolometers (Ti-μbolometers) operating at room temperature to monitor precisely radiation patterns in terahertz time-domain spectroscopy (THz-TDS) systems are demonstrated. To provide comprehensive picture, two different THz-TDS systems and Ti-μbolometers coupled with three different antennas—narrowband dipole antennas for 0.3 THz, 0.7 THz and a log-periodic antenna for wideband detection—were selected for experiments. Radiation patterns, spatial beam profiles and explicit beam evolution along the propagation axis are investigated; polarization-sensitive properties under various THz emitter power ranges are revealed. It was found that the studied Ti-μbolometers are convenient lensless sensors suitable to discriminate and control THz radiation pattern features in various wideband THz-TDS systems.
ISSN:1424-8220
1424-8220
DOI:10.3390/s21103510