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Video detection of far infrared radiation in the spectral region of 10-35 cm-1 was carried out at 4.2 K using Nb thin film microbridges (1×1 µm2 in area and 1000 A thick) in which vortex flux flow existed. A structureless response spectrum with a broad peak at 13 cm-1, very different from those observed previously in Nb-Nb point-contact junctions, was obtained. Some discussions are given on the responsivity of a microbridge operating under vortex flux flow.
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Shirafuji et al. (1980) studied this question.
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