O. Morikawa et al., Vector imaging of supercurrent flow in YBa2Cu3O7-delta thin films using terahertz radiation, APPL PHYS L, 75(21), 1999, pp. 3387-3389
We demonstrated the vector mapping of the supercurrent flow in YBa2Cu3O7-de
lta thin films using a terahertz (THz) radiation imaging system. A wire-gri
d polarizer was employed to detect the vector components of the THz radiati
on. The two THz radiation images obtained through the polarizer tilted by 45 degrees and -45 degrees with respect to the detector's orientation were
successfully transferred into the vector image of the supercurrent distribu
tion. The observed distributions in the current-biased and the vortex-penet
rated films were qualitatively explained using Bean's critical-state model
[E. H. Brandt and M. Indenbom, Phys. Rev. B 48, 12893 (1993)]. (C) 1999 Ame
rican Institute of Physics. [S0003-6951(99)03243-X].