Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects

Details Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects

2009-08-27

arxiv.org/abs/0908.4032v1

Physics

Optics

revtex4, 7 pages, 4 figures

Scientific paper

We theoretically investigate into the effects of the incidence angles in light transmission of cholesteric liquid crystal two-layer sandwich structures with twist defects created by rotation of the one layer about the helical axis.The conoscopic images and polarization resolved patterns are obtained for thick layers by computing the intensity and the polarization parameters as a function of the incidence angles.In addition to the defect angle induced rotation of the pictures as a whole, the rings of defect mode resonances are found to shrink to the origin and disappear as the defect twist angle varies from zero to its limiting value and beyond.

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