title: Nonresonant quadrupolar second-harmonic generation in isotropic solids by use of two orthogonally polarized laser beams.
abstract: We demonstrate an experimental technique for isolating and enhancing quadrupolar second-harmonic generation in isotropic materials by using two orthogonally polarized laser beams that create wavelength-scale, forward-radiating gradients in the second-harmonic polarization.
authors.affiliation: FOCUS Center, Department of Physics, University of Texas at Austin Austin, Texas 78712-1081, USA. sunlf@physics.utexas.edu
authors.forename: L
authors.initials: L
authors.lastname: Sun
authors.forename: P
authors.initials: P
authors.lastname: Figliozzi
authors.forename: Y Q
authors.initials: YQ
authors.lastname: An
authors.forename: M C
authors.initials: MC
authors.lastname: Downer
authors.forename: W L
authors.initials: WL
authors.lastname: Mochan
authors.forename: B S
authors.initials: BS
authors.lastname: Mendoza