Vector imaging of supercurrent flow in YBa2Cu3O7−δ thin films using terahertz radiation
Vector imaging of supercurrent flow in YBa2Cu3O7−δ thin films using terahertz radiation
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使用太赫兹辐射对 YBa2Cu3O7−δ 薄膜中的超电流进行矢量成像
DOI：
10.1063/1.125302
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发表时间：
1999
影响因子：
4
通讯作者：
M. Hangyo
中科院分区：
文献类型：
--
作者：
O. Morikawa;M. Yamashita;H. Saijo;M. Morimoto;M. Tonouchi;M. Hangyo
我们利用太赫兹（THz）辐射成像系统演示了YBa 2Cu 3 O 7 −δ薄膜中超导电流的矢量映射。线栅偏振器被用来检测太赫兹辐射的矢量分量。通过相对于探测器方向倾斜+45°和-45 °的偏振器获得的两个太赫兹辐射图像被成功地转换为超导电流分布的矢量图像。用Bean的临界态模型[E. H. Brandt和M. Indenbom，Phys. Rev. B 48，12893（1993）]。
We demonstrated the vector mapping of the supercurrent flow in YBa2Cu3O7−δ thin films using a terahertz (THz) radiation imaging system. A wire-grid polarizer was employed to detect the vector components of the THz radiation. The two THz radiation images obtained through the polarizer tilted by +45° and −45° with respect to the detector’s orientation were successfully transferred into the vector image of the supercurrent distribution. The observed distributions in the current-biased and the vortex-penetrated films were qualitatively explained using Bean’s critical-state model [E. H. Brandt and M. Indenbom, Phys. Rev. B 48, 12893 (1993)].