响应性胶体晶体反射光谱预测模型及实验验证  

Prediction Model and Experimental Verification of Reflective Spectra of Responsive Colloidal Crystals

作　　者：张金英 王鑫野 司玉琳 王炳楠 杨佳兴 张野效桐 Zhang Jinying;Wang Xinye;Si Yulin;Wang Bingnan;Yang Jiaxing;Zhang Yexiaotong(Beijing Key Lab for Precision Optoelectronic Measurement Instrument and Technology,School of Optics and Photonics,Beijing Institute of Technology,Beijing 100081,China;Yangtze Delta Region Academy of Beijing Institute of Technology,Jiaxing 314001,Zhejiang,China)

机构地区：[1]精密光电测试仪器及技术北京市重点实验室,北京理工大学光电学院,北京100081 [2]北京理工大学长三角研究院,浙江嘉兴314001

出　　处：《光学学报》2024年第4期346-354,共9页Acta Optica Sinica

基　　金：国家自然科学基金(62174012,61704166);国家重点研发计划(2018AAA0100301)。

摘　　要：建立了一种以面心立方三维光子晶体为基础的有限元预测模型,研究了纳米粒子折射率、溶剂折射率、粒子直径、粒子间距等参数对反射光谱的影响。根据预测结果制备了优化尺寸的Fe_(3)O_(4)@SiO_(2)纳米粒子电调谐器件。结果表明,有限元模型预测的反射光谱中心波长在680 nm至455 nm范围内移动,与制备器件的测试光谱匹配性良好。与解析预测模型相比,建立的三维有限元预测模型得到的反射光谱中心波长的预测结果准确性更高。对于非核壳结构,两种模型的预测误差范围分别为0.49%~1.70%、0.82%~1.49%,表现相当;对于核壳结构,两种模型的预测误差范围分别为3.51%~6.11%、0.28%~1.34%。本文建立的三维有限元模型将预测误差典型值降低为原来的1/5.9。所提模型可用于准确预测胶体体系下自组装光子晶体反射光谱的动态调谐能力,弥补了解析预测模型在核壳结构光子晶体预测准确性方面的不足,可指导粒子材料参数和结构参数设计,以及可调谐范围的优化区间筛选。对反射光谱幅值和谱宽预测准确性的提升需进一步考虑短程有序结构等随机微扰特性的影响。Objective The formation mechanism of colors can be divided into two types:chemical color and structural color.Structural color,also known as physical color,is a visual effect produced by the interaction between light and the microstructure inside the material.Compared with chemical colors,structural colors have been widely studied and paid attention to by researchers due to their advantages such as resistance to photobleaching,low-temperature sensitivity,and low pollution.Tunable structural colors have good application prospects in dynamic displays,optical camouflage,and other fields,becoming a research hotspot that researchers are committed to breaking through.Self-assembled technology is an important means to achieve the structural color of photonic crystals,which is achieved by assembling monodisperse organic or inorganic particles into ordered colloidal crystals to obtain the structural color in the visible light region.Responsive photonic crystals adjust the structural color by changing the lattice spacing of photonic crystals.This method has the advantages of convenient tuning and wide tuning range and has achieved many distinctive application effects in experiments.Researchers usually prepare particles of various sizes and then test the structural colors to select particles of appropriate sizes.Although good experimental results have been achieved,this method of particle selection somewhat lacks guidance and is time-consuming and labor-intensive.A high-precision theoretical prediction model is required to guide the design of particle material and structural parameters,as well as the optimization range of tunable range.Methods After summarizing typical experimental measurement data and theoretical calculation data of self-assembled structural colors that have been reported,we compare and analyze the errors between the measured and calculated results.We propose a finite element method prediction model based on face centered cubic three-dimensional photonic crystals.In addition,we study the effects of paramet

关 键 词：光谱学 胶体体系 自组装光子晶体 动态变色器件 有限元预测模型 反射光谱中心波长 

分 类 号：TN202[电子电信—物理电子学]