Title :
The detection of optical second harmonic generation from high Tc YBa/sub 2/Cu/sub 3/O/sub 7/ epitaxial thin films
Author :
Lo, Kuang Yao ; Lue, Juh Tzeng
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
We have attempted to measure the second harmonic generation (SHG) of YBa/sub 2/Cu/sub 3/O/sub 7-/spl delta// (YBCO) epitaxial films grown on [001] MgO substrates by laser ablution. Since the structure of the film has inversion symmetry, the possibly SHG susceptibility can only be attributed to the antiferromagnetic dipoles and electric quadrupoles. The delicate and meticulous experiment shows that the angular dependence of the second harmonic susceptibility of the superconducting films can be fitted successfully by the time-dependent density functional approach.<>
Keywords :
barium compounds; epitaxial growth; high-temperature superconductors; laser ablation; nonlinear optical susceptibility; optical films; optical harmonic generation; superconducting thin films; yttrium compounds; MgO substrates; SHG; SHG susceptibility; YBCO; YBa/sub 2/Cu/sub 3/O/sub 7/; YBa/sub 2/Cu/sub 3/O/sub 7/ epitaxial thin films; angular dependence; antiferromagnetic dipoles; aser ablution; electric quadrupoles; high Tc; inversion symmetry; optical second harmonic generation; superconducting films; time-dependent density functional approach; High temperature superconductors; Nonlinear optics; Optical detectors; Optical films; Optical harmonic generation; Optical scattering; Plasmons; Response surface methodology; Transistors; Yttrium barium copper oxide;
Journal_Title :
Photonics Technology Letters, IEEE
