HIGHLY SENSITIVE INFRARED DETECTOR FABRICATED WITH THIN FILM OF HIGH TC Y-BA-CUO SUPERCONDUCTOR USING PULSED EXCIMER LASER

Award Information
Agency: Department of Defense
Branch: Defense Advanced Research Projects Agency
Contract: N/A
Agency Tracking Number: 8605
Amount: $50,000.00
Phase: Phase I
Program: SBIR
Awards Year: 1988
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
20 Westfield Rd, Coram, NY, 11727
DUNS: N/A
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 DR RAMA RAO
 (516) 732-4016
Business Contact
Phone: () -
Research Institution
N/A
Abstract
IN THE PROPOSED WORK, FEASIBILITY OF DEVELOPING A HIGHLY SENSITIVE AND HIGH SPEED OPTICAL DETECTOR IN THE INFRARED REGION USING A SUPERCONDUCTING WEAK LINK FABRICATED BY LASER INDUCED DEPOSITION OF Y-BA-CU-O THIN FILMS, IS EXAMIED. THE DETECTION PRINCIPLE IS BASED ON THE FACT THAT INCIDENT INFRARED RADIATION PRODUCES A VOLTAGE ACROSS THE JOSEPHSON JUNCTION WHICH CAN SERVE AS A USEFUL DETECTOR OUTPUT. IN THE PRESENT WORK, BULK SUPERCONDUCTOR SAMPLES OF Y-BA-CU-OWILL BE PREPARED BY SOLID STATE REACTION METHOD. THIN SUPERCONDUCTING FILM ON A SUITABLE SUBSTRATE WILL BE PREPARED BY LASER INDUCED DEPOSITION TECHNIQUE USING PULSED EXCIMER LASER. IN THIS TECHNIQUE, THE U.V. LASER REMOVES MOLECULES (PHOTO-ABLATION) FROM THE SUPERCONDUCTOR TARGET WHICH ARE SUBSEQUENTLY DEPOSITED ON MGO SUBSTRATE WHICH HAS BEEN CLEAVED TO FORM A WEAK LINK. A MAJOR ADVANTAGE OF THE PROPOSED TECHNIQUE IS THAT DUE TO EXCELLENT SPATIAL QUALITY AND SHORT WAVELENGTH (O.28 MICRO) OF THE LASER, IT PROVIDES A PRECISE CONTROL OVER THE DEPOSITION PROCESS WITH SUBMICRON RESOLUTION. FOR DETECTION, INFRARED SIGNALS WILL BE MODULATED AND GUIDED THROUGH A OPTICAL FIBER TO THE DETECTOR. DETECTOR PERFORMANCE IN TERMS OF, RESPONSIVITY AND DYNAMIC RANGE, IN THE SPECTRAL REGION OF 1-10 MICRON WILL BE EVALUATED.

* Information listed above is at the time of submission. *

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