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Evidence for a Dual-Source Mechanism of Terahertz Radiation from Rectangular Mesas of Single Crystalline Bi2Sr2CaCu2O8+delta Intrinsic Josephson Junctions

Source: J. Phys. Soc. Jpn. 79, 023703 (2010); doi:10.1143/JPSJ.79.023703

Issue Date: 1 March 2010

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Kazuo Kadowaki
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Manabu Tsujimoto
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Kazuhiro Yamaki
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Takashi Yamamoto
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Takanari Kashiwagi
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Hidetoshi Minami
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Masashi Tachiki
Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan

Richard A. Klemm
Department of Physics, University of Central Florida, Orlando, FL 32816, U.S.A.
The THz radiation emitted from rectangular mesas of single-crystal Bi2Sr2CaCu2O8+delta was studied using angular distribution measurements and Fourier transform infrared spectroscopy. Unlike the recent theoretical predictions, the results provide strong evidence for a dual-source mechanism in which the uniform and non-uniform parts of the ac-Josephson current act as electric and magnetic current sources, respectively. The latter synchronizes with cavity modes of the mesa with integral harmonics of the fundamental radiation. ©2010

(As supplied by publisher.)

Permalink: http://dx.doi.org/10.1143/JPSJ.79.023703
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