1. THz Wave Emission from Intrinsic Josephson Junctions Controlled by Surface Impedance.
- Author
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Nonomura, Yoshihiko
- Subjects
- *
ELECTRIC impedance , *MAXWELL equations , *ELECTROMAGNETIC fields , *PARTIAL differential equations , *MAGNETIC fields - Abstract
Recently terahertz wave emission from intrinsic Josephson junctions without external magnetic fields has been intensively studied, and some emission states have been proposed numerically or theoretically. For the surface impedance Z=1, the McCumber-like state with small spatial dependence of the electric field in the junction becomes stable, while for large and complex Z, the π-phase kink state characterized by translational symmetry breaking along the layered structure becomes stable. In the present study, the relations between these two extreme cases are clarified numerically by solving the coupled equations of the Josephson relations and the Maxwell equations for an experimental width of the junction, 86 μm. The dynamical phase diagram in the surface impedance ( Z)–current ( J) plane and the optimal value of Z for the strongest emission are evaluated. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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