A new type of infrared multipixel staring array is proposed based upon the recently observed phenomenon of photofluxonics. The sensor is based on a simple Josephson junction and is the magnetic analogue of a CCD photosensor; a novel device geometry allows the direct conversion of photons to fluxons. The quantized nature of the photon to fluxon conversion process affords a very low NDP. Experiments indicate that single quantum sensitivity in the infrared and far infrared range of the spectrum is possible. An array of such detectors would be an all thin film, monolithic, focal plane device with inherently low power consumption. It will be possible to implement the associated read out electronics on the same substrate. Phase I will demonstrate the photofluxonic effect in a Nb-Al203- Nb Josephson junction and, according to the results, optimize the preliminary design for an array of superconducting photosensitive pixels. Although well characterized low Tc superconductors will be used in Phase I, the photofluxonic effect has also been observed in high Tc superconductors and there seems to be no major impediment to implementing the technology with high Tc materials in Phase II.

Agency
National Science Foundation (NSF)
Institute
Division of Industrial Innovation and Partnerships (IIP)
Type
Standard Grant (Standard)
Application #
9261151
Program Officer
Darryl G. Gorman
Project Start
Project End
Budget Start
1993-01-15
Budget End
1993-09-30
Support Year
Fiscal Year
1992
Total Cost
$50,000
Indirect Cost
Name
Quantum Magnetics, Inc.
Department
Type
DUNS #
City
San Diego
State
CA
Country
United States
Zip Code
92128