Self-emission from intrinsic Josephson junction arrays in misaligned Tl2Ba2CaCu2O8+δ thin films at 78 K

We report off-chip self-emission at 76.9 GHz from intrinsic Josephson junction arrays in misaligned Tl2Ba2CaCu2O8+δ thin films at 78 K. The substrate was considered as a dielectric resonator antenna to improve the coupling between arrays and electromagnetic waves. Three-dimensional numerical simulations were performed to guide and explain the experiments. Sharp radiation 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 experiment combined with numerical simulations.