Terahertz response for bicrystal YBCO Josephson junctions

被引：25

作者：

Nakajima, K ^{[1
]}

Chen, J ^{[1
]}

Myoren, H ^{[1
]}

Yamashita, T ^{[1
]}

Wu, PH ^{[1
]}

机构：

[1] NANJING UNIV, NANJING 210008, PEOPLES R CHINA

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期

关键词：

D O I：

10.1109/77.621773

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

High-frequency response of bicrystal YBa2Cu3O7-delta Josephson junctions for far infrared laser irradiation is presented. The junctions on silicon and MgO substrates exhibit the remarkable first order Shapiro step for the methanol line at 1.76 THz. dV/dI measurements reveal several steps corresponding to the methanol lines at 1.48, 1.76 and 2.53 THz. The line width of Josephson oscillation at these frequencies is estimated from the width of the Shapiro steps. It is suggested that the excess shot noise broaden the line width.

引用

页码：2607 / 2610

页数：4

共 8 条

[1] WHITE-NOISE MEASUREMENTS AND JOULE HEATING IN SUPERCONDUCTING POINT CONTACTS [J].