Noise and specific detectivity measurements on high-temperature superconducting transition-edge bolometers

Robert D. Black; Antonio Mogro-Campero; Lawrence G. Turner

doi:10.1117/12.21039

1 October 1990 Noise and specific detectivity measurements on high-temperature superconducting transition-edge bolometers

Robert D. Black, Antonio Mogro-Campero, Lawrence G. Turner

Author Affiliations +

Proceedings Volume 1292, Superconductivity Applications for Infrared and Microwave Devices; (1990) https://doi.org/10.1117/12.21039
Event: 1990 Technical Symposium on Optics, Electro-Optics, and Sensors, 1990, Orlando, FL, United States

Abstract

The effects of thermal fluctuation noise in thermal detectors can be lessened by reducing heat capacity and thermal conductance. An attempt to accomplish this with the YBa2Cu3O(7-x) (YBCO) bolometer by making YBCO resistors on thermally isolated membranes is reported. The spectral power of the electrical noise of YBCO films on SrTiO3, bulk silicon with a buffer layer, and in thin dielectric membranes is measured. It is found that 1/f noise predominates in polycrystalline YBCO films on silicon-based substrates. Films on SrTiO3 with good electrical properties are dominated by thermal fluctuation noise, just as in the case of low-temperature superconductors. The implications of these findings for bolometer are addressed. The specific detectivity of a bolometric pixel made on bulk SrTiO3 is reported.

Citation Download Citation

Robert D. Black, Antonio Mogro-Campero, and Lawrence G. Turner "Noise and specific detectivity measurements on high-temperature superconducting transition-edge bolometers", Proc. SPIE 1292, Superconductivity Applications for Infrared and Microwave Devices, (1 October 1990); https://doi.org/10.1117/12.21039

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