Recently, in relation to the THz wave emission, there arises much attention in studies of the electromagnetic waves excited in the intrinsic Josephson junctions (IJJs) of high Tc superconductors. We investigate by numerical simulation the electromagnetic wave emission from the in-phase IJJs without an applied magnetic field. Due to the boundary condition of the electromagnetic field at the edges of the junctions, large intensity of the emitted power is obtained, when the anti-nodes of the standing waves in the inside induction field coincides with the boundary edge, As the result, we have an oscillatory increase of the emitted power with a decreasing bias current in the in-phase IJJs, and the maximum emitted power is obtained near the retrapping point. In the longer in-phase junctions, solitonic (vortex-anti-vortex) phase motions are also excited when certain conditions are satisfied. We discuss also those effects on the emitted power.
- Intrinsic Josephson junction
- THz wave emission
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering