Possible enhancement in bolometric response using free-standing film of YBa2Cu3Ox

Hon Kie Ng; S. Kilibarda

doi:10.1117/12.45592

1 July 1991 Possible enhancement in bolometric response using free-standing film of YBa2Cu3Ox

Hon Kie Ng, S. Kilibarda

Proceedings Volume 1477, Superconductivity Applications for Infrared and Microwave Devices II; (1991) https://doi.org/10.1117/12.45592
Event: Orlando '91, 1991, Orlando, FL, United States

Abstract

Improvement of the sensitivity in infrared detectors made of high Tc superconducting films is discussed. Usually these films are grown on a substrate which results in reduced sensitivity due to additional heat capacity of the substrate. A five-fold increase of the noise equivalent power is calculated if free-standing superconducting films are used. A new technique for preparation of thin films of YBa2Cu3Ox without a substrate is also described. The film material is deposited by pulsed laser ablation on a thin carbon film. When the film is annealed in situ in oxygen, the carbon burns off, leaving a free-standing film. The film area can be large as 10X10 mm2 and less than one-half micron thick. They have the correct stoichiometry, the orthorhombic phase and an onset temperature of about 85 K.

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Hon Kie Ng and S. Kilibarda "Possible enhancement in bolometric response using free-standing film of YBa2Cu3Ox", Proc. SPIE 1477, Superconductivity Applications for Infrared and Microwave Devices II, (1 July 1991); https://doi.org/10.1117/12.45592

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