摘要
采用时域有限差分(FDTD)法,对由银-氧化铟锡(ITO)薄膜构成的一维光子晶体结构在300~800nm波段范围内的滤波特性进行了研究。仿真研究了金属缺陷层厚度、入射角度和ITO膜厚度等对光子晶体滤波特性的影响。对不同参量下光子晶体结构的色散曲线也进行了仿真计算,并分析了色散机理。结果表明,改变缺陷层的厚度能够调制光子晶体的滤波范围及滤波波形;入射光线小角度范围(0°~20°)内的变化对该光子晶体滤波性能的影响甚微;随着ITO膜厚度的增加,滤波波谱呈周期性变化。
The filtering characteristic of the one-dimensional photonic crystal structure composed of Ag-ITO thin films in the spectral range of 300-800 nm is investigated by the finite difference time domain method. The influences of metal defect layer thickness, incident angle, and ITO film thickness on filtering characteristics of photonic crystals are simulated. The dispersion relationships of the photonic crystal under different parameters are simulated and calculated, and the corresponding mechanisms are analyzed. The results indicate that, the filtering range and filtering waveform of the photonic crystal can be modulated by tuning defect layer thickness. The change of the incident light in the small angle range （0°~20°） has little influence on the filtering performance of the photonic crystal. With the increase of ITO film thickness, the filtering spectrum shows a periodic change.
作者
刘圆圆
李旭峰
赵亚丽
彭伟
杨雯
Liu Yuanyuan;Li Xufeng;Zhao Yali;Peng Wei;Yang Wen(School of Applied Science, Taiyuan University of Science and Technology, Taiyuan, Shanxi 030024, China;No. 33 Research Institute of China Electronics Technology Group Corporation, Taiyuan, Shanxi 030024, China;School of Physics and Optoeleetronic Technology, Dalian University of Technology, Dalian, Liaoning 116024, China)
出处
《激光与光电子学进展》
CSCD
北大核心
2018年第5期443-448,共6页
Laser & Optoelectronics Progress
基金
山西省应用基础研究计划(201701D121007
201701D121050)
山西省高等学校创新人才支持计划
山西省回国留学人员科研资助项目(2016-096)
关键词
薄膜
光子晶体
滤波器
缺陷
时域有限差分法
thin films
photonic crystals
filter
defect
finite-difference time-domain method
