Abstract-High-T c superconducting Josephson mixers for terahertz heterodyne detection

M. Malnou¹, C. Feuillet-Palma¹, C. Ulysse², G. Faini², P. Febvre³, M. Sirena⁴,L. Olanier¹, J. Lesueur¹ and N. Bergeal¹
 HIDE AFFILIATIONS
1 Laboratoire de Physique et d'Etude des Matériaux—UMR8213-CNRS-ESPCI ParisTech-UPMC-PSL university, 10 Rue Vauquelin—75005 Paris, France
2 Laboratoire de Photonique et de Nanostructures LPN-CNRS, Route de Nozay, 91460 Marcoussis, France
3 IMEP-LAHC—UMR 5130 CNRS, Université de Savoie, 73376 Le Bourget du Lac cedex, France
4 Centro Atómico Bariloche, Instituto Balseiro—CNEA and Univ. Nac. de Cuyo, Av. Bustillo 9500, 8400 Bariloche, Rio Negro, Argentina\
http://scitation.aip.org/content/aip/journal/jap/116/7/10.1063/1.4892940

We report on an experimental and theoretical study of the high-frequency mixing properties of ion-irradiated YBa2Cu3O7 Josephson junctions embedded in THz antennas. We investigated the influence of the local oscillator power and frequency on the device performances. The experimental data are compared with theoretical predictions of the general three-port model formixers in which the junction is described by the resistively shunted junction model. A good agreement is obtained for the conversion efficiency in different frequency ranges, spanning above and below the characteristic frequencies fc of the junctions.