Novel terahertz radiation from flux-trapped YBa2Cu3O7-delta thin films excited by femtosecond laser pulses

被引：27

作者：

Tonouchi, M

Tani, M

Wang, Z

Sakai, K

Wada, N

Hangyo, M

机构：

[1] KANSAI ADV RES CTR,COMMUN RES LAB,NISHI KU,KOBE 65124,JAPAN

[2] OSAKA UNIV,SUPERCOND MAT & ELECT RES CTR,SUITA,OSAKA 565,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1997年 / 36卷 / 2A期

关键词：

high-T-c superconductor; femtosecond laser pulse; ultrashort electromagnetic pulse; THz radiation; trapped flux;

D O I：

10.1143/JJAP.36.L93

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We discovered a pew type of terahertz (THz) radiation from YBa2Cu3O7-delta thin films. Ultrashort electromagnetic pulses, which are referred to as THz radiation, were emitted into free space by irradiating the superconductive films with femtosecond laser pulses. The THz radiation, with a spectrum extending from 0.1 to 3 THz, was excited in both the films applied with a magnetic field and the flux-trapped films. The results suggest that the screening current for the external magnetic field and circulating current around the trapped Bur play an important role in the emission mechanism.

引用

页码：L93 / L95

页数：3

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