Resonant terahertz radiation from Tl2Ba2CaCu2O8+δ thin films by ultrafast optical pulse excitation

被引：31

作者：

Tominari, Y

Kiwa, T

Murakami, H

Tonouchi, M

Wald, H

Seidel, P

Schneidewind, H

机构：

[1] Osaka Univ, Res Ctr Superconductor Phys, Suita, Osaka 5650871, Japan

[2] Inst Phys High Technol, Dept Cryoelect, D-07702 Jena, Germany

[3] Japan Sci & Technol Corp, CREST, Suita, Osaka 5650871, Japan

[4] Univ Jena, Inst Festkorperphys, D-07743 Jena, Germany

来源：

APPLIED PHYSICS LETTERS | 2002年 / 80卷 / 17期

关键词：

D O I：

10.1063/1.1475770

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have observed the free-space radiation of the resonant terahertz wave from c-axis oriented Tl2Ba2CaCu2O8+delta thin films by femtosecond optical pulse excitation under a radial magnetic field of about 100 Oe nearly parallel to the c axis of the thin film. The observed wave form showed clear oscillations up to 80 K. The frequency was shifted from similar to620 GHz at 24 K to similar to300 GHz at 80 K, corresponding to an increase in c-axis penetration depth, lambda(c), from similar to26 mum to similar to53 mum, and disappeared above T-C as expected for the Josephson plasma resonance. (C) 2002 American Institute of Physics.

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页码：3147 / 3149

页数：3

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