title: Photoinduced anisotropy and polarization holography in a stilbene-containing fluorinated polyimide.
abstract: A stilbene-containing fluorinated polyimide with high optical and thermal stability was prepared. The photoinduced anisotropy in this polyimide was investigated by measuring its dichroism and photoinduced birefringence. A large photoinduced birefringence (Deltan approximately 10(-2)) was achieved in the polymer. Stable and pure polarization phase gratings without surface-relief structure were written in the polymer film by using two orthogonally linearly or circularly polarized 532 nm beams. The polarization gratings were studied with a 650 nm probe beam by measuring the diffraction efficiency of the probe beam and surveying the conversion of the polarization state of the probe beam.
authors.affiliation: Department of Physics, Shanghai Jiao Tong University, Shanghai, China.
authors.forename: Tingchao
authors.initials: T
authors.lastname: He
authors.forename: Changshun
authors.initials: C
authors.lastname: Wang
authors.forename: Xu
authors.initials: X
authors.lastname: Pan
authors.forename: Hui
authors.initials: H
authors.lastname: Yang
authors.forename: Guoyuan
authors.initials: G
authors.lastname: Lu