Self-emission from intrinsic Josephson junction arrays in misalignedTl2Ba2CaCu2O8 + δ thin films at 78 K

Abstract

We report off-chip self-emission at 76.9 GHz from intrinsic Josephson junction arrays in misalignedTl2Ba2CaCu2O8 + δ thin films at 78 K. The substrate was considered as a dielectric resonator antenna toimprove the coupling between arrays and electromagnetic waves. Three-dimensionalnumerical simulations were performed to guide and explain the experiments. Sharpradiation peaks with a maximum radiation power of 17.7 pW were observed. Furthermore,we investigated the angular dependence of the radiation power in terms of experimentcombined with numerical simulations.