title: The effect of the ferroelectric domain walls in the scanning near field optical microscopy response of periodically poled Ba(2)NaNb(5)O(15) and LiNbO(3) crystals.
abstract: A study of Ba(2)NaNb(5)O(15) and LiNbO(3) crystals with periodic ferroelectric domain structures using the scanning near field optical microscopy technique is reported. Optical contrast is observed in the regions of ferroelectric domain boundaries and it is analysed using beam propagation method modelling. This reveals that the optical contrast, a consequence of changes in the refractive index, is not due to variation of the waveguide-coupling efficiency, and supports the hypothesis that it is associated with the domain array, which is related to the size of the domain.
authors.affiliation: Department of Physics, University of Strathclyde, Glasgow G4 0NG, UK.
authors.forename: T P J
authors.initials: TP
authors.lastname: Han
authors.forename: F
authors.initials: F
authors.lastname: Jaque
authors.forename: J
authors.initials: J
authors.lastname: Lamela
authors.forename: D
authors.initials: D
authors.lastname: Jaque
authors.forename: G
authors.initials: G
authors.lastname: Lifante
authors.forename: F
authors.initials: F
authors.lastname: Cusso
authors.forename: A A
authors.initials: AA
authors.lastname: Kamiskii