Antenna-coupled titanium microbolometersQi, Liang (Avtor) Minkevičius, Linas (Avtor) Urbanowicz, Andrzej (Avtor) Švigelj, Andrej (Avtor) Grigelionis, Ignas (Avtor) Kašalynas, Irmantas (Avtor) Trontelj, Janez (Avtor) Valušis, Gintaras (Avtor) titanium-based microbolometeric sensorsTHz time-domain spectroscopy systemsprecise THz mode controlradiation pattern monitoringAn 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.20212023-01-25 10:14:53Članek v reviji143985UDK: 621.3ISSN pri članku: 1424-8220DOI: 10.3390/s21103510COBISS_ID: 139338243sl