WOLTE 2
Proceedings of the Second European Workshop on Low Temperature Electronics

J. Phys. IV France 06 (1996) C3-289-C3-294
DOI: 10.1051/jp4:1996344

Thermal Model for the Bolometric Response of YBaCuO Films on Polycrystalline YSZ at 10.6 µm Wavelength

Z. Ben Ayadi¹, A. Gaugue¹, A. Degardin¹, E. Caristan¹, A. Kreisler¹, M. Fourrier² and M. Redon<sup>3

1</sup>  Laboratoire de Génie Électrique de Paris, Universités Paris 6 et Paris 11, URA 127 CNRS, SUPÉLEC, Plateau de Moulon, 91192 Gif sur Yvette Cedex, France
²  Laboratoire de Dispositifs Infrarouge et Microondes, Université Paris 6, Tour 12, Case 92, 4 Place Jussieu, 75252 Paris Cedex 05, France
³  Laboratoire d'Électronique Analogique et Microondes, Université Paris 6, Tour 12, Case 92, 4 Place Jussieu, 75252 Paris Cedex 05, France

Abstract
Economical bolometers, using YBaCuO thin films sputtered on polycrystalline zirconia substrates, have been fabricated and tested at λ=10µm with a cw CO₂ laser. A 2D thermal model for the bolometric response has been developed to include the film to substrate thermal boundary resistance, and take into consideration the various heat flow regimes inside the film and the substrate. This model has been found successful to predict both the amplitude and phase components of the bolometer response with respect to the modulation signal frequency. In particular, the amplitude response, which contains a succession of f^-1 and f^-l/2 sections separated by well-identified corner frequencies, could be quantitatively predicted in the 0.5 Hz to 100 kHz experimental frequency range.

© EDP Sciences 1996