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Author
Klapwijk, T. M.
;
Barends, R.
;
Gao, J. R.
;
Hajenius, M.
;
Baselmans, J. J. A.
Title
Improved superconducting hot-electron bolometer devices for the THz range
Type
Conference Article
Year
2004
Publication
Proc. SPIE
Abbreviated Journal
Proc. SPIE
Volume
5498
Issue
Pages
129-139
Keywords
HEB mixer distributed model, numerical model
Abstract
Improved and reproducible heterodyne mixing (noise temperatures of 950 K at 2.5 THz) has been realized with NbN based hot-electron superconducting devices with low contact resistances. A distributed temperature numerical model of the NbN bridge, based on a local electron and a phonon temperature, has been used to understand the physical conditions during the mixing process. We find that the mixing is predominantly due to the exponential rise of the local resistivity as a function of electron temperature.
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Invited talk, Recommended by Klapwijk
Approved
no
Call Number
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912
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