A high-drop hole-type photonic crystal add-drop filter  

作　　者：蒋俊贞 强则煊 张昊 郑彦敏 邱怡申 

机构地区：[1]Fujian Provincial Key Laboratory for Photonics Technologyty,Key Laboratory of Optoelectronic Science and Technology for Medicine,Ministry of Education,Institute of Laser and Optoelectronics Technology,Fujian Normal University [2]Department of Electronic Information Science,Fujian Jiangxia College

出　　处：《Optoelectronics Letters》2014年第1期34-37,共4页光电子快报（英文版）

基　　金：the Natural Science Foundation of Fujian Province of China(No.2012J01253)

摘　　要：Based on the effect of total internal reflection(TIR)and photonic band gap,a new type of hexagonal-lattice hole-type silicon photonic crystal add-drop filter is proposed with a large circular hole as inner ring.The single mode operation is realized by compressing the two rows of photonic crystal above and below the line defect waveguide.Two-dimensional(2D)finite-difference time-domain(FDTD)method is then applied to investigate the impacts of side length of inner ring and coupling strength on its drop efficiency.It is also fairly compared with the traditional inner ring structure composed of hexagonal-lattice holes.The results show that the proposed structure can offer higher spectral selectivity than the traditional one.Two channel wavelengths of 1.425μm and 1.45μm can be simultaneously dropped at corresponding ports with drop efficiency of more than 90%and quality factor of 900 in the proposed configuration when the width of bus waveguide,the side length of inner ring and the coupling strength are 0.8 3 a,4a and 0,respectively,where a is the lattice constant.Based on the effect of total internal reflection（TIR）and photonic band gap,a new type of hexagonal-lattice hole-type silicon photonic crystal add-drop filter is proposed with a large circular hole as inner ring.The single mode operation is realized by compressing the two rows of photonic crystal above and below the line defect waveguide.Two-dimensional（2D）finite-difference time-domain（FDTD）method is then applied to investigate the impacts of side length of inner ring and coupling strength on its drop efficiency.It is also fairly compared with the traditional inner ring structure composed of hexagonal-lattice holes.The results show that the proposed structure can offer higher spectral selectivity than the traditional one.Two channel wavelengths of 1.425μm and 1.45μm can be simultaneously dropped at corresponding ports with drop efficiency of more than 90%and quality factor of 900 in the proposed configuration when the width of bus waveguide,the side length of inner ring and the coupling strength are 0.8 3 a,4a and 0,respectively,where a is the lattice constant.

关 键 词：光子晶体 滤波器 孔型 有限差分时域 六方晶格 耦合强度 效率下降 光谱选择性 

分 类 号：TN713[电子电信—电路与系统] O734[理学—晶体学]