Title :
A Room Temperature Bolometer for Terahertz Coherent and Incoherent Detection
Author :
Cherednichenko, Sergey ; Hammar, Arvid ; Bevilacqua, Stella ; Drakinskiy, Vladimir ; Stake, Jan ; Kalabukhov, Alexey
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg, Sweden
Abstract :
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.
Keywords :
bolometers; coherence; submillimetre wave devices; bolometer; frequency 0.5 kHz to 100 kHz; incoherent detection; local oscillator power; nanosecond response; noise equivalent power; power 0.74 mW; temperature 293 K to 298 K; terahertz coherent; terahertz frequency range; Bolometers; Frequency modulation; Gain; Mixers; Temperature measurement; Thermal conductivity; Yttrium barium copper oxide; Bolometer; YBCO; mixer; room temperature detector; submillimeter; terahertz (THz);
Journal_Title :
Terahertz Science and Technology, IEEE Transactions on
DOI :
10.1109/TTHZ.2011.2164654
