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Partially Superconducting Thin Film Detectors

IP.com Disclosure Number: IPCOM000086570D
Original Publication Date: 1976-Sep-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Von Gutfeld, RJ: AUTHOR

Abstract

R. J. von Gutfeld, Applied Physics Letters 26, 680 (1975) describes an optical or thermal energy detector comprised of a thin film in which a transverse thermoelectric voltage is developed in the plane of the film upon radiation with light or thermal energy. This voltage develops due to a variation in either composition or film thickness, which gives rise to a variation in thermopower Q along the plane of the film, together with a periodic temperature fluctuation due to anisotropic heat flow when energy is incident on the film. If the film is deposited along a slant angle, a plurality of slanted columns will be provided which in turn causes the anisotropic heat flow.

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Partially Superconducting Thin Film Detectors

R. J. von Gutfeld, Applied Physics Letters 26, 680 (1975) describes an optical or thermal energy detector comprised of a thin film in which a transverse thermoelectric voltage is developed in the plane of the film upon radiation with light or thermal energy. This voltage develops due to a variation in either composition or film thickness, which gives rise to a variation in thermopower Q along the plane of the film, together with a periodic temperature fluctuation due to anisotropic heat flow when energy is incident on the film. If the film is deposited along a slant angle, a plurality of slanted columns will be provided which in turn causes the anisotropic heat flow.

The present structure enhances these effects by increasing the difference in thermopower between the slant angle columns and the regions between the columns. A periodic structure is provided in which the slanted columns have a finite thermopower Q while the regions between the columns have very small (approximately zero) thermopower Q. In this manner, the device is more sensitive.

A superconducting film is deposited along slant angles to make the slanted columns shown in the figure. Due to size effects (the difference in thickness between the slanted columns and the regions between the columns), the columns will remain normal while the regions between the columns are superconducting. This provides a partially superconducting detector having a periodic spa...