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SIS QUANTUM DETECTOR IN THE 1-10 MICRON REGION FABRICATED BY SEQUENTIAL…

Award Information

Agency:
Department of Defense
Branch:
Defense Advanced Research Projects Agency
Award ID:
9696
Program Year/Program:
1990 / SBIR
Agency Tracking Number:
9696
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Excel Superconductors, Inc.
140-29 Keyland Court Bohemia, NY 11716
View profile »
Woman-Owned: No
Minority-Owned: Yes
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 1990
Title: SIS QUANTUM DETECTOR IN THE 1-10 MICRON REGION FABRICATED BY SEQUENTIAL DEPOSITION OF THIN FILMS OF HIGH TC BI-CA-SR-CU-O
Agency / Branch: DOD / DARPA
Contract: N/A
Award Amount: $250,000.00
 

Abstract:

IN THE PROPOSED PROGRAM, FOR THE FIRST TIME, FEASIBILITY OF DEVELOPING AND CHARACTERIZING A HIGHLY SENSITIVE AND HIGH SPEED QUANTUM DETECTOR IN THE 1-10 U WAVELENGTH REGION USING A SUPERCONDUCTING SIS TYPE WEAK LINK OF BI-CA-SR-CU-O, IS EXAMINED. THE DETECTION PRINCIPAL IS BASED ON THE FACT THAT THE ABSORBED INFRARED RADIATION REDUCES THE ENERGY GAP OF THE SUPERCONDUCTOR, MODIFYING THE CURRENT-VOLTAGE CHARACTERISTICS OF JOSEPHSON JUNCTION WHICH CAN SERVE AS A USEFUL DETECTOR OUTPUT. RECENTLY, IN A PRELIMINARY EXPERIMENT, WE HAVE OBSERVED FOR THE FIRST TIME, NOT ONLY A SLOW BOLOMETRIC RESPONSE BUT ALSO A FAST NON-THERMAL QUANTUM RESPONSE DUE TO COOPER PAIR BREAKING AND QUASI-PARTICLES GENERATION IN YBA-CU-O FILM SUBJECTED TO PULSED 532 NM LASER. IN THE PRESENT WORK, PRECISELY CONTROLLED SUPERCONDUCTING, INSULATING, AND SUPERCONDUCTING THIN FILMS OF BI-CA-SR-CU-O WILL BE DEPOSITED ON A SUITABLE SUBSTRATE BY PLASMA ASSISTED LASER DEPOSITION USING 265 NM UV LASER AT 10 HZ. SUBSEQUENT TO A DEPOSITION, SUPERCONDUCTING WEAK LINK SIS TYPE JOSEPHSON JUNCTION WILL BE FABRICATED BY PATTERNING THESE FILMS WITH 532 NM VISIBLE LASER A 1 KHZ. FOR DETECTION, INFRARED RADIATION FROM ND:YAG LASER AT 1.06 U WILL BE MODULATED AND GUIDED THROUGH AN OPTICALFIBER TO THE DETECTOR. IN THE PHASE I, NON-EQUILIBRIUM (QUANTUM) RESPONSE OF THE DETECTOR AT 1.06 U AND THE TEMPERATURE DEPENDENCE OF THE RESPONSE WILL BE STUDIED. THE RESPONSIVITY OF THE DETECTOR IS ESTIMATED TO BE \ 10(4) V/W, WHICH IS SEVERAL ORDERS OF MAGNITUDE HIGHER THAN PRESENTLY AVAILABLE QUANTUM DETECTORS. IN PHASE II, WAVELENGTH DEPENDENCE OF THE RESPONSE IN THE 1-10 U REGION, HIGH FREQUENCY RESPONSE, AND THE TEMPERATURE DEPENDENCE OF THE RESPONSIVE TIME WILL BE INVESTIGATED.

Principal Investigator:

Dr Rama Rao
5165637067

Business Contact:

Small Business Information at Submission:

Excel Technology Inc.
140-20 Keyland Ct Bohemia, NY 11716

EIN/Tax ID:
DUNS: N/A
Number of Employees:
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No