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Power load dependen...
Power load dependencies of cold electron bolometer optical response at 350 ghz
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Tarasov, M.A. (författare)
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Edelman, V.S. (författare)
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Ermakov, A.B. (författare)
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visa fler...
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- Mahashabde, Sumedh, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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Kuzmin, L.S. (författare)
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visa färre...
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(creator_code:org_t)
- 2014
- 2014
- Engelska.
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Ingår i: 25th International Sympsoium on Space Terahertz Technology, ISSTT 2014; Moscow; Russian Federation; 27 April 2014 through 30 April 2014. ; , s. 35-41
- Relaterad länk:
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https://research.cha...
Abstract
Ämnesord
Stäng
- Cold electron bolometers integrated with twin-slot antennas have been designed and fabricated. Optical response was measured in 0.06-0.6 K temperature range using black body radiation source at temperature 2-15 K. The responsivity of 0.3109 V/W was measured at 2.7 K radiation temperature. The estimated ultimate dark responsivity at 100 mK can approach Sv=1010 V/W and reduces down to 1.1108 V/W at 300 mK for the sample with absorber volume of 510-20 m3. At high power load levels and low temperatures the changes of tunneling current, dynamic resistance and voltage response have been explained by non-thermal energy distribution of excited electrons. Distribution of excited electrons in such system is of none-Fermi type, electrons with energies of the order of 1 K tunnel from normal metal absorber to superconductor instead of relaxing down to thermal energy kTe. This effect can reduce quantum efficiency of bolometer from hf/kTph in ideal case down to single electron per signal quantum in the high power case.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Nyckelord
- submillimeter wave technology
- slot antennas
- nanofabrication
- bolometers
- superconducting devices
Publikations- och innehållstyp
- kon (ämneskategori)
- ref (ämneskategori)