Second-Harmonic Generation in CuCl Nanocrystal-Embedded Amorphous Indium Tin Oxide Thin Film

Second-harmonic generation has been observed in CuCl-embedded amorphous indium tin oxide thin film prepared by the sputtering method even though poling has not been carried out. The incident angle dependence and polarization dependence of the intensity of the second-harmonic wave suggest that the direction of anisotropy is predominantly perpendicular to the film surface, although the anisotropy the direction of which is parallel to the film surface is also present. The latter is ascribable to the laser-induced structural change of the film.