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 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 beams. The polarization gratings were studied with a probe beam by measuring the diffraction efficiency of the probe beam and surveying the conversion of the polarization state of the probe beam.
© 2009 Optical Society of America
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