Band gaps structure and semi-Dirac point of two-dimensional function photonic crystals

Two-dimensional function photonic crystals, in which the dielectric constants of medium columns are the functions of space coordinates , are proposed and studied numerically. The band gaps structures of the photonic crystals for TE and TM waves are different from the two-dimensional conventional pho...

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Published inChinese physics B Vol. 26; no. 2; pp. 242 - 249
Main Author 张斯淇 陆景彬 梁禺 马季 李宏 李雪 刘晓静 吴向尧 孟祥东
Format Journal Article
LanguageEnglish
Published 01.02.2017
Subjects
二维
介电常数
光子晶体
函数形式
带隙结构
数值研究
狄拉克
空间坐标
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Summary:Two-dimensional function photonic crystals, in which the dielectric constants of medium columns are the functions of space coordinates , are proposed and studied numerically. The band gaps structures of the photonic crystals for TE and TM waves are different from the two-dimensional conventional photonic crystals. Some absolute band gaps and semiDirac points are found. When the medium column radius and the function form of the dielectric constant are modulated, the numbers, width, and position of band gaps are changed, and the semi-Dirac point can either occur or disappear. Therefore,the special band gaps structures and semi-Dirac points can be achieved through the modulation on the two-dimensional function photonic crystals. The results will provide a new design method of optical devices based on the two-dimensional function photonic crystals.
Bibliography:two-dimensional photonic crystals function dielectric constants band gaps structures
Two-dimensional function photonic crystals, in which the dielectric constants of medium columns are the functions of space coordinates , are proposed and studied numerically. The band gaps structures of the photonic crystals for TE and TM waves are different from the two-dimensional conventional photonic crystals. Some absolute band gaps and semiDirac points are found. When the medium column radius and the function form of the dielectric constant are modulated, the numbers, width, and position of band gaps are changed, and the semi-Dirac point can either occur or disappear. Therefore,the special band gaps structures and semi-Dirac points can be achieved through the modulation on the two-dimensional function photonic crystals. The results will provide a new design method of optical devices based on the two-dimensional function photonic crystals.
Si-Qi Zhang1, Jing-Bin Lu1, Yu Liang2, Ji Ma2, Hong Li3, Xue Li1, Xiao-Jing Liu2, Xiang-Yao Wu2, Xiang-Dong Meng2 （1. Institute of Physics, Jilin University, Changchun 130012, China; 2.Institute of Physics, Jilin Normal University, Siping 136000, China; 3.Institute of Physics, Northeast Normal University, Changchun 130012, China）
11-5639/O4
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/26/2/024208