Antenna-coupled titanium microbolometers : application for precise control of radiation patterns in terahertz time-domain systems

Qi, Liang (author), Minkevičius, Linas (author), Urbanowicz, Andrzej (author), Švigelj, Andrej (author), Grigelionis, Ignas (author), Kašalynas, Irmantas (author), Trontelj, Janez (author), Valušis, Gintaras (author)

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.

• Language: English
• Keywords: titanium-based microbolometeric sensors, THz time-domain spectroscopy systems, precise THz mode control, radiation pattern monitoring
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 11 str.
• Numbering: Vol. 21, iss. 10, art. 3510
• PID: 20.500.12556/RUL-143985
• UDC: 621.3
• ISSN on article: 1424-8220
• DOI: 10.3390/s21103510
• COBISS.SI-ID: 139338243
• Publication date in RUL: 25.01.2023

Record is a part of a journal

• Title: Sensors
• Shortened title: Sensors
• Publisher: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 18.05.2021

Secondary language

• Language: Slovenian
• Keywords: mikrobolometrični senzorji na osnovi titana, THz sistemi spektroskopije v časovni domeni, natančna kontrola THz načina, spremljanje vzorcev sevanja