Electro-optic effect in polymer-dispersed cholesteric liquid crystals with medium chirality
| Autor: | Gouram Chilaya, Ulrike Behrens, Heinz-S. Kitzerow |
|---|---|
| Rok vydání: | 1994 |
| Předmět: |
chemistry.chemical_classification
Materials science Biaxial nematic Electro-optic effect business.industry Analytical chemistry General Chemistry Polymer Polarizer Condensed Matter Physics law.invention Condensed Matter::Soft Condensed Matter Wavelength Optics chemistry law Liquid crystal Transmittance General Materials Science business Chirality (chemistry) |
| Zdroj: | Liquid Crystals. 17:597-603 |
| ISSN: | 1366-5855 0267-8292 |
| DOI: | 10.1080/02678299408036744 |
| Popis: | We have investigated the electro-optic behaviour of polymer sheets containing small chiral nematic liquid crystal droplets. In previous investigations of polymer-dispersed liquid crystals (PDLC), either non-chiral nematic liquid crystals or cholesteric liquid crystals with very small pitch (p < γ) have been used. Here we adjusted the pitch p to be below the Mauguin limit, but well above the wavelength, γ, of the visible range of light; typically we chose p ≈ 2γ/Δn. Between crossed polarizers, the sample can be switched from a transparent off state to a dark on state. With respect to non-chiral nematic PDLC films, the transmittance is lower, but the angular dependence is improved. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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