混合型Fe_(3)O_(4)@SiO_(2)胶体光子晶体光传输特性的仿真分析  

Simulation Analysis of Optical Transmission Characteristics of Mixed Fe_(3)O_(4)@SiO_(2) Colloidal Photonic Crystals

作　　者：魏超萍 温小翔 刘宇婷 卢学刚[1,2] 杨森 WEI Chao-ping;WEN Xiao-xiang;LIU Yu-ting;LU Xue-gang;YANG Sen(School of Physics,Xi′ an Jiaotong University, Xi′ an 710049, China;MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, Xi′ an 710049, China)

机构地区：[1]西安交通大学物理学院,陕西西安710049 [2]物质非平衡合成和调控教育部重点实验室,陕西西安712249

出　　处：《红外》2021年第10期16-23,共8页Infrared

基　　金：国家自然科学基金项目(61975162)。

摘　　要：除了通过改变胶体粒子半径及晶格常数来实现对光子带隙的调控方式之外,能否利用不同尺寸粒子的混合精确控制胶体光子晶体的显色行为是人们关注的一个重要科学问题。在分析Fe_(3)O_(4)@SiO_(2)胶体光子晶体的带隙范围与介电常数、电磁波入射角度、晶格常数、颗粒尺寸、SiO_(2)包覆层厚度的依赖关系的基础上,利用数值仿真手段对不同尺寸粒子混合得到的光子晶体的光传输特性进行了研究。结果发现,两种粒径的磁性胶体粒子按不同质量比混合后,其光子带隙位置始终落在两种粒径胶体粒子各自形成光子晶体的带隙位置之间,且随着大粒径颗粒掺杂比的增加,反射光谱逐渐红移。这一结果证明混色原理对胶体光子晶体仍然是适用的。该结果对研究胶体光子晶体结构色的新型调控方式具有重要的参考价值。In addition to changing the radius and lattice constant of colloidal photonic crystals to achieve the modulation of photonic bandgap,it is also an important scientific problem that whether the chromogenic behavior can be precisely controlled by the mixing of various size particles.By means of numerical simulation,on the basis of analyzing the dependence of Fe_(3)O_(4)@SiO_(2) colloidal photonic crystal bandgap range on dielectric constant,electromagnetic wave incidence angle,lattice constant,particle size,and SiO_(2) coating thickness,the optical transmission characteristics of photonic crystals obtained by mixing particles of varied sizes were studied.The simulation results found that after the magnetic colloidal particles of two particle sizes are mixed at different mass ratios,the photonic bandgap position always falls between the bandgap positions of the photonic crystals formed by the two colloidal particles with different sizes.The reflection spectra gradually shift to red as the doping ratio of the large particle size increases.This result proves that the principle of color mixing is still applicable to colloidal photonic crystals.It has an important reference value for the study of new adjustment methods of colloidal photonic crystal structural color.

关 键 词：胶体光子晶体 光子带隙 有限元法 光传输特性 结构色 

分 类 号：O43[机械工程—光学工程]