Proceedings of the 3^rd European Workshop on Low Temperature Electronics
WOLTE 3

J. Phys. IV France 08 (1998) Pr3-263-Pr3-266
DOI: 10.1051/jp4:1998358

Submillimeter wave detection with high temperature superconducting bolometers

A. Gaugue¹, E. Caristan¹, D. Robbes², C. Gunther², A. Sentz³ and A. Kreisler<sup>1

1</sup>  Laboratoire de Génie Électrique des Universités Paris 6 et l l, URA 127 du CNRS, Supélec, Plateau du Moulon, 9 l 192 Gif-sur-Yvette cedex, France
²  GREYC, UPRES-A 6072 du CNRS, ISMRa de Caen, 6 boulevard du Maréchal Juin, 14050 Caen cedex, France
³  Laboratoire des Dispositifs Infrarouge et Microondes, EA 253, Tour 12/E2, Université Paris 6, Case 92, 4 place Jussieu, 75252 Paris cedex 05, France

Abstract
We have fabricated and characterized a planar antenna-coupled microbolometer working at the resistive transition edge of a HT_c superconducting film for use as a submillimeter wave detector. A log-periodic antenna was used to couple the incoming radiation to a YBaCuO thin film microbridge. The performance of the antenna and the bolometer response were obtained by using a 119 µm H₂O laser source. Both the radiation pattern directivity and the detector responsivity were clearly improved by irradiating the antenna from the dielectric substrate side by means of a hyper-hemispherical silicon lens.

© EDP Sciences 1998