Josephson Vortex Flow and Plasma Amplification in High-Tc Superconductors

We investigate Josephson vortex flow states in two device arrangements considered to amplify the excited Josephson plasma. First, we study an intrinsic Josephson junction embedded inside a wave guide. The simulation result in the system reveals that the amplitude of the excited electric field almost linearly grows along the junction plane at the resonant voltage with the Josephson plasma. Second, we simulate a system composed of two separated Josephson junctions embedded inside a long wave guide and confirm that the excited electric field is amplified by the synchronization between two junction sites.