title: Self-focusing without external electric field in BaTiO(3).
abstract: We report on the first observation, to our knowledge, of self-focusing without an external electric field in barium titanate crystals under cw laser beam irradiance. This effect we observed at an intensity of 0.2W/cm(2) on the 633nm wavelength regime in the case of ordinarily as well as extraordinarily polarized light.
authors.forename: Anne
authors.initials: A
authors.lastname: Rausch
authors.forename: Armin
authors.initials: A
authors.lastname: Kiessling
authors.forename: Richard
authors.initials: R
authors.lastname: Kowarschik