title: Microstructure of a poled surface-relief grating and its electro-optic response.
abstract: The microstructure of a poled surface-relief grating of an azobenzene side-chain polymer film is investigated. From the in situ monitoring of diffraction efficiency and second-harmonic generation, as well as dynamic-contact electrostatic force microscopy images, the point group symmetry of C2nu is identified. The polarization-dependent electro-optic measurement of the reflected diffraction order further confirms the optically biaxial structure of the poled surface-relief grating.
authors.affiliation: Department of Physics, Ewha Womans University, Seoul 120-750, South Korea.
authors.forename: Hye Jeong
authors.initials: HJ
authors.lastname: Chang
authors.forename: Boyoung
authors.initials: B
authors.lastname: Kang
authors.forename: Hyunhee
authors.initials: H
authors.lastname: Choi
authors.forename: J W
authors.initials: JW
authors.lastname: Wu