Azopolymer/Liquid Crystal Complex for Polarization Holograms
| Autor: | Hisae Yoshizawa, Katsunori Kawano, Shin Yasuda, Kazuhiro Hayashi, Jiro Minabe, Yasuhiro Ogasawara, Kouichi Haga |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Birefringence Materials science Physics and Astronomy (miscellaneous) business.industry General Engineering Holography General Physics and Astronomy Polymer Diffraction efficiency Polarization (waves) law.invention Optics chemistry Write once read many Liquid crystal law Optoelectronics Irradiation business |
| Zdroj: | Japanese Journal of Applied Physics. 46:3840-3844 |
| ISSN: | 1347-4065 0021-4922 |
| DOI: | 10.1143/jjap.46.3840 |
| Popis: | We have proposed and demonstrated a new holographic medium that can act as a write once read many (WORM) polarization-recordable medium. The new medium, composed of azobenzene-containing polymer and photocurable liquid crystal, exhibited birefringence when irradiated by polarized light. Additionally, the diffraction efficiency and the birefringence of this recorded complex increased to several times those of the simple rewritable azopolymer. This occurred because the orientation of photocurable liquid crystals was as good as that of the azopolymer because of the interaction with the mesogens. By measuring the birefringence, we confirmed that unlike the azopolymer, the orientation of the liquid crystal polymer was maintained even after circularly polarized beam irradiation. In this medium, only the photocurable liquid crystals were cured and became polymers with fixed orientation. Therefore, we propose that the new medium, which is polarization-recordable, WORM and highly sensitive, is very promising and practical for digital holographic storage. |
| Databáze: | OpenAIRE |
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