Numerical study for electromagnetic wave emission in thin samples of intrinsic Josephson junctions

作者：Koyama T^*; Matsumoto H; Ohta Y; Machida M

来源：Physica C-Superconductivity and Its Applications, 2011, 471(21-22): 1202-1205.

DOI：10.1016/j.physc.2011.05.159

• Intrinsic Josephson junctions
• THz emission

Emission of THz electromagnetic waves from thin samples of intrinsic Josephson junctions (IJJ's) is numerically studied, using the xz-model. We show that the spatial symmetry of the electromagnetic excitations corresponding to the pi-cavity mode is different from that of the 2 pi-cavity mode in the IJJ's where the junction parameters such as the Josephson critical current are weakly inhomogeneous. In such Ills the emission in the [001] direction, which is forbidden in the dipole emission, appears at the pi-cavity mode resonance, whereas it is not observed in the 2 pi-cavity mode resonance. It is also shown that the strong emission occurs when the transition between branches in the I-V characteristics takes place.

• 出版日期2011-11