Active and Passive LC Based Polarization Elements |
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| Authors: | J. Stumpe O. Sakhno Y. Gritsai R. Rosenhauer Th. Fischer M. Rutloh |
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| Affiliation: | 1. Fraunhofer Institute for Applied Polymer Research, Potsdam, Germany;2. University of Potsdam, Inst. of Chemistry, Potsdam, Germanyjoachim.stumpe@iap.fraunhofer.de osten@ito.uni-stuttgart.de;4. University of Potsdam, Inst. of Chemistry, Potsdam, Germany |
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| Abstract: | Passive and active polarization elements were created by surface and bulk photo-alignment of LCs, reactive LCs, photo-sensitive LCP and photo-curable monomer/LC composites. The use of different photosensitive liquid crystalline materials for the development of highly anisotropic elements with high spatial resolution and stability or, alternatively, fast switch ability will be discussed. Photo-active and voltage tunable polarization and diffraction elements are presented. For active micro-optic application a photo-addressed patterned retarder was created. Electrically switchable diffraction gratings were generated by interference exposure of photo-curable LC composites at room temperature characterized by droplet free morphology. These polarization sensitive diffraction elements are characterized be excellent optical properties and low switching times. |
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| Keywords: | Polarization elements diffractive elements polarization gratings switchable retarder polymer/LC composites electrically switchable gratings. |
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