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US 4,464,065 AGranted
Fast granular superconducting bolometer
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsStuart A. Wolf, Ulrich Strom, Kurt Weiser
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Abstract
A granular superconducting thin film bolometer made by anodizing a thin film of such materials as niobium nitride to form a thin granular film separated by and covered with the anodized oxide. The bolometer is cooled to its superconducting state and electrically connected to a biasing and detecting network. Its temporal response is better than 1 ns.
Claims8
A bolometer, comprising:
- a substrate of material that is thermally conductive but electrically insulating;
- a superconducting granular thin film formed by partially anodizing a continuous thin film of the material of the grains of said granular thin film, said continuous thin film being deposited upon said substrate;
- two spaced electrical contacts to said granular film;
- cooling means for maintaining said substrate at a substantially constant temperature near the superconducting transition temperature of said grains;
- a biasing network for impressing a current through said granular film;
- and
- a detecting network for measuring resistance changes in said granular film.
4 more elements
Dependencies are inferred from the claim text.