影响三维woodpile型金红石二氧化钛光子晶体完全禁带的主要因素研究

Main factors for affecting complete forbidden band of 3-D woodpile type rutile titanium dioxide photonic crystals

基于平面波展开法,用Bandsolve软件分别计算得到最大完全禁带,研究介电常数、填充率对woodpile光子晶体结构完全禁带的影响,给出了介电常数及填充比发生变化时光子禁带的变化规律,并总结了不同介质棒宽度,不同间距的woodpile结构对应的光子晶体的归一化频率的位置和范围。模拟结构显示,当woodpile的结构确定以后,归一化频率随着介电常数的增大而减小;当woodpile结构中介质棒的间距确定以后,归一化的频率随着介质棒的宽度增大而减小;当woodpile结构中介质棒的宽度确定以后,归一化的频率随着介质棒之间间距的增大而增大。

Based on the plane wave expansion method,maximum complete forbidden band is calculated separately with the Bandsolve software,and the influence of main factors such as the dielectric constant and filling ratio on the woodpile complete band of3-D photonic crystal is studied. It was found that when the woodpile structure is fixed,normalized frequency decreases with the increase of dielectric constant; When bar spacing in the dielectric woodpile structures is determined,the normalized frequency decreases as the width of the dielectric rod; When the width of the dielectric rod in the woodpile structure is determined,the normalized frequency increases as the spacing between dielectric rods. In addition,the location of the normalized frequency and scope of band corresponding to the different medium width,different spacing of the woodpile structure of photonic crystal are summarized.