| 基于空气环结构的大带隙二维光子晶体的设计 |
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| 引用本文： | 张亚茹,孔令凯,冯卓宏,郑志强.基于空气环结构的大带隙二维光子晶体的设计[J].光学技术,2010,36(2). |
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| 作者姓名： | 张亚茹 孔令凯 冯卓宏 郑志强 |
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| 作者单位： | 福建师范大学,物理与光电信息科技学院,福建,福州,350007 |
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| 基金项目： | 福建省自然科学基金(A0510014)资助项目;;福建省科技厅资助项目(2006F5025) |
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| 摘 要： | 用平面波展开法研究了内介质柱截面为长方形的三角晶格空气环型光子晶体的完全带隙特性。通过调节内介质柱的大小、介电常数、旋转角度以及空气环外半径对完全带隙的影响,找到了一组可以获得大带隙二维光子晶体结构的最佳参数。经优化后得到禁带宽度Δω=0.082(2πca-1)(其中a为晶格常数,c为光速),中心频率ω0=0.401(2πca-1),完全带隙宽度与中心频率的比值达到了20.4%,该结果比圆形内介质柱截面空气环结构的完全带隙大,比普通的空气孔结构的完全带隙增大了37%。
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| 关 键 词： | 环形光子晶体 光子带隙 平面波展开法 |
Design of a two-dimensional photonic crystal with large photonic bandgap based on ring-shaped air holes |
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| ZHANG Ya-ru,KONG Ling-kai,FENG Zhuo-hong,ZHENG Zhi-qiang.Design of a two-dimensional photonic crystal with large photonic bandgap based on ring-shaped air holes[J].Optical Technique,2010,36(2). |
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| Authors: | ZHANG Ya-ru KONG Ling-kai FENG Zhuo-hong ZHENG Zhi-qiang |
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| Institution: | School of Physics and Opto-Electronics Technology;Fujian Normal University;Fuzhou 350007;Fujian;China |
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| Abstract: | Plane wave expansion method is employed to study the characteristic of the photonic band gap (PBG) structure of two-dimensional photonic crystal consisting of a triangular lattice with ring-shaped air holes which inner-dielectric cylinders are rectangular.The optimal samples that possess the largest gap-mid gap ratio are obtained by scanning the four parameters (size,dielectric constant,rotating angle of inner-dielectric cylinders and outside radius of air ring).It is showed that when the dielectric constan... |
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| Keywords: | photonic crystal with ring-shaped air holes photonic band gap plane wave expansion method |
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