High speed nonlinear detection of short pulses of mid and far infrared radiation with a current biased granular thin film of Bi2Sr2CaCu2O8

P. G. Huggard

doi:10.1117/12.2297758

1 October 1991 High speed nonlinear detection of short pulses of mid and far infrared radiation with a current biased granular thin film of Bi₂Sr₂CaCu₂O₈

P. G. Huggard

Author Affiliations +

Proceedings Volume 1576, 16th International Conference on Infrared and Millimeter Waves; 157619 (1991) https://doi.org/10.1117/12.2297758
Event: 16th International Conference on Infrared and Millimeter Waves, 1991, Lausanne, Switzerland

Abstract

The work introduced below has extended previous reports of far infrared (FIR: 10 cm^-1 < ω < 100 cm^-1) responses from granular Y-Ba-Cu-O [1] and Tl-Ba-Sr-Cu-O [2] films to the Bi₂Sr₂CaCu₂O₈ system for the first time. More importantly, the photosignal was found to depend on √Power over a two orders of magnitude range of incident powers. The detection mechanism is therefore believed to arise from the interaction of current biased intergranular Josephson junctions with radiation induced screening currents. A non bolometric response is also observed at low temperatures at a mid infrared frequency of 903 cm^-1.

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P. G. Huggard "High speed nonlinear detection of short pulses of mid and far infrared radiation with a current biased granular thin film of Bi₂Sr₂CaCu₂O₈", Proc. SPIE 1576, 16th International Conference on Infrared and Millimeter Waves, 157619 (1 October 1991); https://doi.org/10.1117/12.2297758

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