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Japanese Journal of Applied Physics

Submillimeter-Wave Response of Nb-YBaCuO Point-Contact Josephson Junctions : Electrical Properties of Condensed Matter

Syozo Imai, Tadayuki Tozawa, Gin-ichiro Oya, Tokukō Sugai, Yosihisa Takeuti, Nobuo Mikoshiba

Published Apr 20, 1988• 0 citations
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The Shapiro steps in the submillimeter wave (SMMW) region were measured in point-contact Josephson junctions made of a Nb strip with a sharpened edge and a YBaCuO thin film. The thin film was prepared by the chemical vapor deposition (CVD) method. The dependence of the Shapiro step width on the SMMW power was measured for the wavelength of 570.6 µm (525.4 GHz). The dependence was similar to that found in microbridges made of low T c superconductors. The first-order Shapiro step was observed for the wavelength of 232.9 µm (1.287 THz).