Titanium-based microbolometers : control of spatial profile of terahertz emission in weak power sources

Minkevičius, Linas (avtor), Qi, Liang (avtor), Siemion, Agnieszka (avtor), Jokubauskis, Domas (avtor), Sešek, Aleksander (avtor), Švigelj, Andrej (avtor), Trontelj, Janez (avtor), Seliuta, Dalius (avtor), Kašalynas, Irmantas (avtor), Valušis, Gintaras (avtor)

Terahertz (THz) imaging and spectroscopy set-ups require fine optical alignment or precise control of spatial mode profile. We demonstrate universal, convenient and easy-to-use imaging—resonant and broadband antenna coupled ultrasensitive titanium-based—dedicated to accurately adjust and control spatial mode profiles without additional focusing optical components of weak power THz sources. Versatile operation of the devices is shown using different kinds of THz—electronic multiplier sources, optical THz mixer-based frequency domain and femtosecond optoelectronic THz time-domain spectrometers as well as optically pumped molecular THz laser. Features of the microbolometers within 0.15–0.6 THz range are exposed and discussed, their ability to detect spatial mode profiles beyond the antennas resonances, up to 2.52 THz, are explored. Polarization-sensitive mode control possibilities are examined in details. The suitability of the resonant antenna-coupled microbolometers to resolve low-absorbing objects at 0.3 THz is revealed via direct, dark field and phase contrast imaging techniques as well.

• Jezik: Angleški jezik
• Ključne besede: microbolometer, terahertz sensing, terahertz imaging systems, dark field method, phase contrast method
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FE - Fakulteta za elektrotehniko
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2020
• Št. strani: 12 str.
• Številčenje: Vol. 10, iss. 10, art. 3400
• PID: 20.500.12556/RUL-133712
• UDK: 621.317.794
• ISSN pri članku: 2076-3417
• DOI: 10.3390/app10103400
• COBISS.SI-ID: 58940931
• Datum objave v RUL: 10.12.2021

Gradivo je del revije

• Naslov: Applied sciences
• Skrajšan naslov: Appl. sci.
• Založnik: MDPI
• ISSN: 2076-3417
• COBISS.SI-ID: 522979353

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
• Začetek licenciranja: 14.05.2020

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: mikrobolometer, teraherčno zaznavanje, teraherčni slikovni sistemi, metoda temnega polja, metoda faznih kontrastov

Projekti

• Financer: EC - European Commission
• Program financ.: European Regional Development Fund
• Številka projekta: 01.2.2-LMT-K-718-01-0047
• Akronim: KOTERA-PLAZA