Reorientational optical nonlinearity of nematic liquid-crystal cells near the nematic-isotropic phase transition temperature

Ming-Shan Tsai; I-Min Jiang; Chi-Yen Huang; Chia-Chi Shih

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Reorientational optical nonlinearity of nematic liquid-crystal cells near the nematic-isotropic phase transition temperature

机译：向列相各向同性相变温度附近向列液晶单元的方向性光学非线性

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We address the reorientational optical nonlinearity of homogeneously aligned neamtic liquid-crystal (NLC) cells. The propagation of light in NLC cells depend strongly on temperature. At a temperature approaching the clearing point, an undulating beam and multifocal points are observed in the NLC cell by use of a polarizing optical microscope. Using a conoscopic technique, we observed novel consecutive concentric and parabolic patterns projected onto a screen. Optical energy is considered to compete with thermal energy to affect NLC's orientation and to generate singularities in the steady state. A model of the configuration of the liquid crystal's orientation is proposed.

机译：我们解决了均匀排列的线性液晶（NLC）单元的重新定向光学非线性问题。 NLC电池中的光传播很大程度上取决于温度。在接近澄清点的温度下，通过使用偏振光学显微镜在NLC池中观察到起伏的光束和多焦点。使用锥镜技术，我们观察到了投影到屏幕上的新颖连续同心和抛物线图案。光能被认为与热能竞争，从而影响NLC的方向并在稳态下产生奇异性。提出了液晶取向构型的模型。

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《Optics Letters》 |2003年第23期|共3页
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Ming-Shan Tsai; I-Min Jiang; Chi-Yen Huang; Chia-Chi Shih;
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中图分类光学;
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1. Reorientational optical nonlinearity of nematic liquid-crystal cells near the nematic-isotropic phase transition temperature [J] . Ming-Shan Tsai, I-Min Jiang, Chi-Yen Huang, Optics Letters . 2003,第23期

机译：向列相各向同性相变温度附近向列液晶单元的方向性光学非线性
2. Texture transformations and thermo-optical properties of nematic mesogen at nematic-isotropic liquid phase transition [J] . Arif Nesrullajev Journal of Molecular Liquids . 2014,第Null期

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3. Electro-optic response of surface-induced nematic order above the nematic-isotropic phase transition temperature [J] . Kim JH., Rosenblatt C., Petschek RG. Physical review, E. Statistical physics, plasmas, fluids, and related interdisciplinary topics . 1999,第5aPta1期

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4. Colossal optical nonlinear effects at the nematic-isotropic temperature transition in azo dye-doped liquid crystals [C] . I. Lazo-Martinez, I. Guizar-Iturbide, A. Olivares-Perez, Liquid Crystals IX . 2005

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5. Critical properties of nematic-isotropic transition near the Landau point and line defects in biaxial nematics. [D] . Liu, Jiming. 1991

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6. The Design and Investigation of Nanocomposites Containing Dimeric Nematogens and Liquid Crystal Gold Nanoparticles with Plasmonic Properties Showing a Nematic-Nematic Phase Transition (Nu-Nx/Ntb) [O] . Maria-Gabriela Tamba, Chih Hao Yu, Bai Jia Tang, 2014

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Reorientational optical nonlinearity of nematic liquid-crystal cells near the nematic-isotropic phase transition temperature

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