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二维介质柱型Archimedes(4,82)复式晶格光子晶体禁带特性研究

Bandgap Characteristics of Twodimensional Archimedes (4,82)Compound Lattice Photonic Cystals with Dielectric Rods

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摘要

采用平面波展开法分别模拟了空气背景下由介质圆柱和方柱构造的二维Archimedes (4,82)复式晶格光子晶体的能带结构,讨论了介质柱形状、折射率、填充比和旋转对称性等因素对完全光子禁带的影响.研究发现,当折射率在2.60到5.40之间时,介质圆柱和方柱构造的二维Archimedes (4,82)复式晶格光子晶体都出现了完全光子禁带.随着折射率的增大,最大完全禁带宽度并非随之增大而是存在峰值,介质圆柱型晶格在折射率为2.80时出现峰值;介质方柱型晶格在折射率为2.80和4.40两处出现峰值,且旋转介质方柱能够明显增大禁带宽度,同时存在最佳旋转角度.分析结果表明,在最大完全禁带处,折射率、填充比以及旋转角度等因素的变化对禁带特性的影响很小.

Abstract

The bandgaps of the twodimensional Archimedes (4,82) lattice consisting of different dielectric circular and square rods were calculated with the plane wave expansion method. The bandgaps of the lattice with dielectric rods were investigated as the refractive index, dielectric rods shape, filling fraction and rotational symmetry changing. It was found that the width of the complete photonic bandgaps is not always increasing with the difference of the refractive index. The widest complete photonic bandgaps could be achieved in the (4,82) structure when the refractive index is between 2.60 and 5.40. For the Archimedes (4,82) lattice of circular dielectric rod, the width of complete bandgap reaches the maximum when the dielectric refractive index of rod is equal to 2.80. Also, the complete bandgap of square dielectric rod reaches the maximum when the dielectric refractive index equals 2.80 and 4.40. In addition, the rotation angle of square dielectric rods can significantly increase the width of complete bandgap. The results demonstrate that the quantity, width and frequency position of bandgaps can be modulated by changing the refractive index, the filling fraction and other structural parameters.

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中图分类号:O481.1;O472.3

DOI:10.3788/gzxb20144306.0616003

基金项目:国家自然科学基金(Nos.61274089, 61307069, 61340053)资助

收稿日期:2013-11-07

修改稿日期:2014-02-14

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韩昌盛:太原理工大学 物理与光电工程学院新型传感器与智能控制教育部重点实验室,太原 030024
杨毅彪:太原理工大学 物理与光电工程学院新型传感器与智能控制教育部重点实验室,太原 030024
王云才:太原理工大学 物理与光电工程学院新型传感器与智能控制教育部重点实验室,太原 030024
费宏明:太原理工大学 物理与光电工程学院新型传感器与智能控制教育部重点实验室,太原 030024
陈智辉:太原理工大学 物理与光电工程学院新型传感器与智能控制教育部重点实验室,太原 030024
李祥霞:太原理工大学 物理与光电工程学院新型传感器与智能控制教育部重点实验室,太原 030024

联系人作者:韩昌盛(han_changsheng@163.com)

备注:韩昌盛(1989-),男,硕士研究生,主要研究方向为二维光子晶体能带特性.

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引用该论文

HAN Changsheng,YANG Yibiao,WANG Yuncai,FEI Hongming,CHEN Zhihui,LI Xiangxia. Bandgap Characteristics of Twodimensional Archimedes (4,82)Compound Lattice Photonic Cystals with Dielectric Rods[J]. ACTA PHOTONICA SINICA, 2014, 43(6): 0616003

韩昌盛,杨毅彪,王云才,费宏明,陈智辉,李祥霞. 二维介质柱型Archimedes(4,82)复式晶格光子晶体禁带特性研究[J]. 光子学报, 2014, 43(6): 0616003

被引情况

【1】骆岩红,赵寰宇,李公平. 基于晶格效应的光子晶体带隙特性研究. 光子学报, 2014, 43(12): 1231001--1

【2】邱平平,邱伟彬,林志立,陈厚波,任骏波,王加贤,阚强,潘教青. 复式晶格二维石墨烯等离子激元晶体的能带结构与态密度. 激光与光电子学进展, 2017, 54(5): 52401--1

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