Title :
Fabrication of an infrared bolometer with a high Tc superconducting thermometer
Author :
Verghese, S. ; Richards, P.L. ; Char, K. ; Sachtjen, S.A.
Author_Institution :
Dept. of Phys., California Univ., Berkeley, CA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
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
Keywords :
barium compounds; bolometers; high-temperature superconductors; superconducting devices; thermometers; yttrium compounds; 630 nm to 100 micron; Al2O3; Fourier transform spectrometer; YBa2Cu3O7; YBa2Cu3O7-Al2O3 ; fabrication; high Tc superconducting thermometer; high temperature superconductors; infrared bolometer; noise equivalent power; responsivity; sapphire substrate; thin-film transition edge thermometer; visible wavelengths; Bolometers; Electric variables measurement; Noise measurement; Optical device fabrication; Optical noise; Power measurement; Substrates; Superconducting device noise; Superconducting photodetectors; Wavelength measurement;
Journal_Title :
Magnetics, IEEE Transactions on
