INFRARED AND MILLIMETER WAVE DETECTION USING THIN FILMS OF PB DOPED BiSrCaCuO SUPERCONDUCTOR

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Authors
  1. Phong, L.N.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
Thin film detectors made of CuO superconductors were developed in our laboratory. This article reports details of the fabrication and testing of Pb doped BiSrCaCuO detectors. The detector comprises a film sensor housed in a small cryostat with built-in bias supply and temperature control circuitry. The film sensor was first deposited by magnetron rf sputtering and then crystallized under a rapid thermal annealing process. The characteristics of the response of the detector under millimeter wave and infrared illumination were investigated. The millimeter wave response exhibited a Josephson component with a D* approximates to 10E8 - 10E9 cm.Hz 1/2/W in the wavelength range of 3 - 8 mm. The transient response to short pulses indicated a time constant tau less than or equal to 10 ns for this component. The response to laser pulses was thermal in origin and inherently compressible, preventing saturation of the detector electronics to intense beams. The wide band characteristic of the responses at both infrared and millimeter wavelengths could be confirmed. The damage threshold of the film sensor was shown to exceed 10 mJ/cm square per 3 ns pulse. The possible use of these detectors for threat detection and the optimization of their figure of merit are discussed.
Report Number
AGARD-CP-555-PAP-9 — CONTAINED IN 95-01669
Date of publication
01 Jan 1995
Number of Pages
9
DSTKIM No
95-01663
CANDIS No
150051
Format(s):
Document Image stored on Optical Disk

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