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

T. Koyama; H. Matsumoto; Y. Ohta; M. Machida

doi:10.1016/j.physc.2011.05.159

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

T. Koyama, H. Matsumoto, Y. Ohta, M. Machida

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

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 π-cavity mode is different from that of the 2π-cavity mode in the IJJ's where the junction parameters such as the Josephson critical current are weakly inhomogeneous. In such IJJ's the emission in the [0 0 1] direction, which is forbidden in the dipole emission, appears at the π-cavity mode resonance, whereas it is not observed in the 2π-cavity mode resonance. It is also shown that the strong emission occurs when the transition between branches in the I-V characteristics takes place.

Original language	English
Pages (from-to)	1202-1205
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	471
Issue number	21-22
DOIs	https://doi.org/10.1016/j.physc.2011.05.159
Publication status	Published - 2011 Nov 1

Keywords

Intrinsic Josephson junctions
THz emission

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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title = "Numerical study for electromagnetic wave emission in thin samples of intrinsic Josephson junctions",

abstract = "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 π-cavity mode is different from that of the 2π-cavity mode in the IJJ's where the junction parameters such as the Josephson critical current are weakly inhomogeneous. In such IJJ's the emission in the [0 0 1] direction, which is forbidden in the dipole emission, appears at the π-cavity mode resonance, whereas it is not observed in the 2π-cavity mode resonance. It is also shown that the strong emission occurs when the transition between branches in the I-V characteristics takes place.",

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T1 - Numerical study for electromagnetic wave emission in thin samples of intrinsic Josephson junctions

AU - Koyama, T.

AU - Matsumoto, H.

AU - Ohta, Y.

AU - Machida, M.

PY - 2011/11/1

Y1 - 2011/11/1

N2 - 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 π-cavity mode is different from that of the 2π-cavity mode in the IJJ's where the junction parameters such as the Josephson critical current are weakly inhomogeneous. In such IJJ's the emission in the [0 0 1] direction, which is forbidden in the dipole emission, appears at the π-cavity mode resonance, whereas it is not observed in the 2π-cavity mode resonance. It is also shown that the strong emission occurs when the transition between branches in the I-V characteristics takes place.

AB - 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 π-cavity mode is different from that of the 2π-cavity mode in the IJJ's where the junction parameters such as the Josephson critical current are weakly inhomogeneous. In such IJJ's the emission in the [0 0 1] direction, which is forbidden in the dipole emission, appears at the π-cavity mode resonance, whereas it is not observed in the 2π-cavity mode resonance. It is also shown that the strong emission occurs when the transition between branches in the I-V characteristics takes place.

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KW - THz emission

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