### Abstract

We explore periodic structures of smectic-C (SmC) liquid crystals, induced optically by a polarization grating. Trie studied cells contain a passive surface of rubbed polyimide and an active photosensitive substrate of azo-dye doped polyimide. In a ncmatic phase the director field can be periodic independent of the angle between the grating vector and the rubbing direction. In the Sm/4 phase periodic structure can be induced only by îayer undulations. The SmC behaves similarly so the nematic phase, but the director can rotate only on a cone, which results in a more complex geometry. The periodic pattern is superimposed with four different director and layer structures. In spite of the coexistence of the nonuniform structures the diffraction efficiency is better in the SrnC, than in the nematic phase.

Original language | English |
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Article number | 011705 |

Pages (from-to) | 117051-117054 |

Number of pages | 4 |

Journal | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |

Volume | 63 |

Issue number | 1 I |

DOIs | |

Publication status | Published - Dec 1 2001 |

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### ASJC Scopus subject areas

- Statistical and Nonlinear Physics
- Statistics and Probability
- Condensed Matter Physics

### Cite this

*Physical Review E - Statistical, Nonlinear, and Soft Matter Physics*,

*63*(1 I), 117051-117054. [011705]. https://doi.org/10.1103/PhysRevE.63.011705