Titanium-based microbolometers

control of spatial profile of terahertz emission in weak power sources

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

Povzetek

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.

Ključne besede

mikrobolometer;teraherčno zaznavanje;teraherčni slikovni sistemi;metoda temnega polja;metoda faznih kontrastov;microbolometer;terahertz sensing;terahertz imaging systems;dark field method;phase contrast method;

Podatki

Jezik:	Angleški jezik
Leto izida:	2020
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FE - Fakulteta za elektrotehniko
UDK:	621.317.794
COBISS:	58940931
ISSN:	2076-3417
Št. ogledov:	166
Št. prenosov:	61
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	mikrobolometer;teraherčno zaznavanje;teraherčni slikovni sistemi;metoda temnega polja;metoda faznih kontrastov;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 1-12
Letnik:	ǂiss. ǂ10
Zvezek:	3400
Čas izdaje:	May.-2 2020
DOI:	10.3390/app10103400
ID:	14083834