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Fabrication of an infrared bolometer with a high Tc superconducting thermometer

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4 Author(s)
Verghese, S. ; Dept. of Phys., California Univ., Berkeley, CA, USA ; Richards, P.L. ; Char, K. ; Sachtjen, S.A.

A sensitive high-Tc superconducting bolometer has been fabricated on a 20-μm-thick sapphire substrate with a YBCO thin-film transition edge thermometer. Optical measurements with a He-Ne laser gave a noise equivalent power of 2.4×10-11 W/Hz 1/2 at 10 Hz, and a responsivity of 17 V/W in good agreement with electrical bolometer measurements. Gold black smoke was then deposited on the backside of the assembled bolometer as an absorber. Spectral measurements on a Fourier transform spectrometer show that the bolometer has useful sensitivity from visible wavelengths to beyond ~100 μm. This performance is superior to that of a commercial room-temperature pyroelectric detector. Some improvement appears possible

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Magnetics, IEEE Transactions on  (Volume:27 ,  Issue: 2 )