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Fast room temperature THz microbolometers

Stella Bevilacqua (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Sergey Cherednichenko (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Vladimir Drakinskiy (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Jan Stake (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Alexei Kalaboukhov (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik)
23rd International Symposium on Space Terahertz Technology (2012)
[Konferensbidrag, refereegranskat]

We will present experimental and theoretical investigation of room temperature high speed THz detectors based on thin YBa2Cu3O7 films. These films have TCR of 0.35%/K, and can sustain large bias current densities. With a resistivity of 100-200 µOhm×cm for a film thickness of 50nm, it is very straightforward to impedance match such bolometers with planar antennas. The responsivity is a function of the bolometer planar dimensions and the films thickness. The currently achieved responsivity is 30 V/W and Johnson noise limited NEP is 70pW/Hz^0.5. The bolometer bandwidth is limited by the antenna bandwidth and spans from microwaves to over a few THz. Experimenatl investigation is done from 100GHz to 2.5THz. The measured response time is 2ns. We will also present results of the bolometer performance as their dimensions reduce to sub-µm.



Denna post skapades 2013-05-23. Senast ändrad 2017-01-27.
CPL Pubid: 177295