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A room temperature bolometer for terahertz coherent and incoherent detection

Sergey Cherednichenko (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Arvid Hammar (Institutionen för mikroteknologi och nanovetenskap, Terahertz- och millimetervågsteknik ) ; Stella Bevilacqua (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)
IEEE Transactions on Terahertz Science and Technology (2156-342X). Vol. 1 (2011), 2, p. 395 - 402.
[Artikel, refereegranskad vetenskaplig]

We present a novel room temperature bolometer with nanosecond response that can be used both for coherent and incoherent detection through the entire terahertz frequency range. A responsivity of up to 15 V/W, and a noise equivalent power (NEP) = 450 pW/Hz0.5 were measured at modulation frequencies from 0.5 kHz to 100 kHz. A conversion gain of -28 dB was demonstrated at an intermediate frequency of 20 MHz with a Local Oscillator power of 0.74 mW. Possible improvements of the bolometer characteristics are discussed.

Nyckelord: terahertz, THz, bolometer, mixer, submillimeter, YBCO, detector


This paper describes THz detector which works at room temperature, with a frequency coverage from 100GHz to several THz. This is a rather unique feature. In contrast to othe bolometric types of detectors, our detector has a very fast response time, as short as 2ns, i.e. abput 70MHz. It means it can measure very short radiation pulses with a high repetition rate.



Denna post skapades 2011-09-22. Senast ändrad 2017-01-27.
CPL Pubid: 146499