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 C_2v 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.
© 2005 Optical Society of America
Hye Jeong Chang, Boyoung Kang, Hyunhee Choi, and J. W. Wu, "Microstructure of a poled surface-relief grating and its electro-optic response," Opt. Lett. 30, 183-185 (2005)