Title :
Ultimate cold-electron bolometer for THz applications
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg, Sweden
fDate :
27 Sept.-1 Oct. 2004
Abstract :
Ultimate cold electron bolometer with strong electrothermal feedback by direct electron cooling of the absorber has been proposed. This concept is proposed to overcome the unavoidable contradiction of supersensitive detectors between supersensitivity and supersaturation due to background power load. The effective electron cooling can be treated as strong electrothermal feedback (ETF) similar to TES (transition edge sensor), an unavoidable dc heating for electrothermal feedback is replaced by deep electron cooling removing all incoming power from the absorber to the next stage and keeping minimum temperature. Noise properties (NEP) are considerably removed by decreasing the electron temperature. All incoming power is removed from supersensitive absorber to the next stage of readout system - SQUID.
Keywords :
SQUIDs; bolometers; submillimetre wave detectors; superconducting device noise; SQUID; THz applications; background power load; cold electron bolometer; dc heating; deep electron cooling; direct electron cooling absorber; electron temperature; electrothermal feedback; noise properties; readout system; supersensitive absorber; supersensitive detectors; transition edge sensor; Bolometers; Cooling; Detectors; Electrons; Electrothermal effects; Feedback; Heating; SQUIDs; Temperature sensors; Thermal sensors;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422043
