| 二维液晶环型光子晶体的可调完全带隙 |
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| 引用本文： | 蔡琳敏,孔令凯,林林,冯卓宏,郑志强.二维液晶环型光子晶体的可调完全带隙[J].福建师范大学学报(自然科学版),2012,28(2):61-65. |
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| 作者姓名： | 蔡琳敏 孔令凯 林林 冯卓宏 郑志强 |
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| 作者单位： | 1. 福建师范大学物理与光电信息科技学院,福建福州,350108
2. 闽江学院物理学与电子信息工程系,福建福州,350108 |
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| 基金项目： | 福建省科技重大专项(2007HJ0004-2);福建省教育厅资助项目(JK2011008) |
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| 摘 要： | 利用平面波展开法研究了二维三角晶格液晶环型光子晶体的完全带隙的动态可调节性.数值模拟结果表明:环中所填充的5CB液晶指向矢的旋转角从0°到90°改变,二维环型光子晶体一直出现完全带隙,并且完全带隙随着液晶指向矢的旋转角的变化可以实现动态可调.分析完全带隙可调范围与二维液晶环型光子晶体的结构参数(液晶环内/外径、基底材料的折射率、液晶正常/反常折射率、内介质柱折射率)的变化关系.
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| 关 键 词： | 液晶 环型光子晶体 完全带隙 可调范围 |
Tunable Absolute Bandgaps in a Two-dimensional Annular Photonic Crystal Modulated by a Nematic Liquid Crystal |
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| CAI Lin-min
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KONG Ling-kai
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LIN Lin
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FENG Zhuo-hong
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ZHENG Zhi-qiang.Tunable Absolute Bandgaps in a Two-dimensional Annular Photonic Crystal Modulated by a Nematic Liquid Crystal[J].Journal of Fujian Teachers University(Natural Science),2012,28(2):61-65. |
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| Authors: | CAI Lin-min KONG Ling-kai LIN Lin FENG Zhuo-hong ZHENG Zhi-qiang |
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| Institution: | 1(1.School of Physics and OptoElectronics Technology,Fujian Normal University,Fuzhou 350108,China;2.Department of Physics and Electronic Information Engineering,Minjiang University,Fuzhou 350108,China) |
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| Abstract: | The tunable absolute bandgaps of two-dimensional annular photonic crystal(PC) infiltrated with liquid crystal(LC) were studied by using the plane wave expansion method(PWE).Numerical simulations showed that absolute bandgaps always existed in two-dimensional PC with rotation angle of the 5CB liquid crystal varying from 0° to 90°,and it could be tunable by changing the optical axis orientation of LC.Moreover,analysis was carried on the relation between tunable range of absolute bandgaps and structural parameters of two-dimensional annular PC infiltrated with LC,such as inner/outside radius of ring-shaped LC,refractive index of substrate materials,the ordinary/extraordinary refractive index of LC and refractive index of inner dielectric column. |
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| Keywords: | liquid crystal annular photonic crystal absolute bandgaps tunable range |
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