Meandering bicrystal Josephson junction arrays in a hemispherical Fabry-Perot resonator

We have explored the coupling mechanism of a millimeter wave radiation to bicrystal Josephson junction arrays embedded in a Fabry - Perot resonator. In order to optimize the system, three- dimensional simulations and relative experiments were performed. By analyzing the results of computer simulations and experiments, we found that the layout of the array and the distance between the array and the plane mirror should minimize the effects on the electrical field E distribution in the fundamental mode of the Fabry - Perot resonator without the sample. In this case, the uniformity of the E field in the bicrystal arrays was demonstrated together with an improvement in the coupling efficiency of the mm wave irradiation to high- temperature superconductor arrays of Josephson junctions.