摘要
双曲超材料作为近年来新兴的超材料,在调控电磁波方面具有很大的优势,为了实现双曲超材料在应用过程中可以更高效地选择和设计,提出了一种基于相变材料Ge_(2)Sb_(2)Te_(5)和金属Ag组成的层状双曲超材料模型,研究了该模型对电磁波的调控规律。通过等效介电常数理论和色散理论分析了模型的等频面变化,得到了光子拓扑跃迁发生时电磁波的变化。通过时域有限差分法对模型进行仿真,根据光子拓扑跃迁解释了模型对电磁波的吸收特性,并通过改变模型Ge_(2)Sb_(2)Te_(5)的薄膜层的介电常数、Ag层所占模型的体积比、电磁波入射角和偏振角,得到双曲超材料模型对电磁波的调控规律,为高吸收太阳能电池、高光谱分辨率的光电探测和生物传感器等领域提供理论基础。
Hyperbolic metamaterials,as emerging metamaterials in recent years,have great advantages in the regulation of electromagnetic waves.To realize a broader application prospect of hyperbolic metamaterials,a model of layered hyperbolic metamaterials based on the composition of the phase transition material Ge_(2)Sb_(2)Te_(5)and the metal Ag is proposed,and researches the regulation laws of the model on electromagnetic waves.The equi-frequency surface change of the model is analyzed by the equivalent dielectric constant theory and dispersion theory,and the change of the electromagnetic wave when the photonic topological jump occurs is obtained.The model is simulated by time-domain finite-difference,the absorption properties of the model are explained by the photon topological leap,the modulation law of the hyperbolic metamaterial model on electromagnetic waves is obtained by changing the dielectric constant,metal-to-volume ratio,incidence angle of electromagnetic waves and polarization angle of the layers of the model Ge_(2)Sb_(2)Te_(5),which will provide theoretical foundations for the fields of high-absorption solar cells,high spectral resolution photoelectric detection and biosensors,and so on.
作者
李潇琦
汪剑波
LI Xiaoqi;WANG Jianbo(School of Physics,Changchun University of Science and Technology,Changchun 130022;Jilin Province Zhengzhen Inspection Co.,Changchun 130117)
出处
《长春理工大学学报(自然科学版)》
2025年第2期1-8,共8页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
吉林省教育厅科学研究项目(JJKH20220724KJ)
吉林省科技厅科技发展计划项目(20240402068GH)。
关键词
双曲超材料
光子拓扑跃迁
吸收特性
电磁波调控
hyperbolic metamaterials
photonic topological transition
absorption properties
electromagnetic wave modulation
