title: Noncollinear optical frequency doubling in strontium barium niobate.
abstract: The observation of a novel noncollinear optical second-harmonic generation mechanism is reported. In strontium barium niobate crystals, a circular cone of second-harmonic light is generated when a fundamental beam of intensive laser light is directed along the crystallographic c axis. It can be shown that the effect is caused by the nonlinear polarization of antiparallel ordered ferroelectric microdomains.
authors.affiliation: Fachbereich Physik, Universität Osnabrück, D-49069 Osnabrück, Germany.
authors.forename: Arthur R
authors.initials: AR
authors.lastname: Tunyagi
authors.forename: Michael
authors.initials: M
authors.lastname: Ulex
authors.forename: Klaus
authors.initials: K
authors.lastname: Betzler