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平行取向向列相液晶缺陷光子晶体透射谱

Photonic Crystal Transmission Spectrum with Parallel Alignment Nematic Liquid Crystal Defect

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摘要

研究了平行取向向列相液晶缺陷多层介质膜一维光子晶体的透射谱特性。自然光垂直入射,光子禁带范围为518.5~582.0 nm,并且禁带中观察到成对出现的透射峰。偏振光垂直入射,当偏振方向分别与液晶盒摩擦方向垂直、平行时,成对透射峰中的一个消失。而当入射光偏振方向与摩擦方向成45°时,光子禁带中仍出现了成对透射峰。由于液晶层具有折射率各向异性,光波存在两种本征模式(e模式和o模式)。入射光偏振方向与摩擦方向平行时为e模式,与摩擦方向垂直时为o模式,与摩擦方向成45°时两种模式共存。

Abstract

Transmission spectral properties of one-dimensional multilayer photonic crystal infiltrated with a parallel nematic liquid crystal are investigated. The range of photonic band gap is 518.5~582.0 nm when natural light is incident vertically to the glass substrate and paired transmission peaks are observed in photonic band gap. One of the paired transmission peaks disappears in the case of adding a polarizer and making polarization direction parallel or perpendicular to rubbing direction with vertical incidence of polarized light. For an angle of 45° between polarization direction and rubbing direction, paired transmission still appears in photonic band gap. Optical wave has two eigenmodes (e- and o-mode) because of the anisotropy of liquid crystal layer. When the polarization direction of incident light is parallel to rubbing direction the optical wave is in e-mode, and when perpendicular to rubbing direction it is in o-mode. For the case of polarization direction and rubbing direction at an angle of 45°, two modes coexist.

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中图分类号:O753+.2

DOI:10.3788/aos201333.1023002

所属栏目:光学器件

基金项目:国家自然科学基金(60578035)、辽宁省自然科学基金(20102191)、辽宁省科技研究项目(L2010465)、辽宁省教育厅项目(L2012070)

收稿日期:2013-04-19

修改稿日期:2013-05-17

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乌日娜:沈阳理工大学理学院,辽宁 沈阳 110159
吴杰:沈阳理工大学理学院,辽宁 沈阳 110159
李勇:沈阳理工大学理学院,辽宁 沈阳 110159
岱钦:沈阳理工大学理学院,辽宁 沈阳 110159

联系人作者:乌日娜(wurina2007@126.com)

备注:乌日娜(1978—),女,博士,副教授,主要从事光电功能材料及器件方面的研究。

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引用该论文

Wu Rina,Wu Jie,Li Yong,Dai Qin. Photonic Crystal Transmission Spectrum with Parallel Alignment Nematic Liquid Crystal Defect[J]. Acta Optica Sinica, 2013, 33(10): 1023002

乌日娜,吴杰,李勇,岱钦. 平行取向向列相液晶缺陷光子晶体透射谱[J]. 光学学报, 2013, 33(10): 1023002

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