用于编码成像的连续域束缚态OA
Bound states in the continuum for encoded imaging
超表面是一种在亚波长尺度上精细调控电磁波特性的人工结构,广泛应用于操纵光的传播、相位、振幅和极化等特性.在这项工作中,提出了一种基于金属超表面的连续域束缚态(BIC)结构.通过使用CST和COMSOL两款软件对金属结构进行调整,能够在0.8217 THz的频率下实现显著的准BIC峰值.通过多级展开分析发现,电偶极子是该结构共振特性的主要因素.利用BIC的特性创建并运行了成像系统.根据仿真结果,该成像系统表现出了出色的灵敏度和分辨率,显示出太赫兹成像的巨大潜力.这项研究不仅为BIC结构的创建提供了新的想法,而且为高性能太赫兹成像技术的发展提供了有效的参考.
Metasurfaces are artificial structures that can finely control the characteristics of electromagnetic waves at subwavelength scales,and they are widely used to manipulate the propagation,phase,amplitude,and polariza-tion of light.In this work,a bound state in the continuum(BIC)structure based on a metallic metasurface is pro-posed.By adjusting the metallic structure using CST and COMSOL software,a significant quasi-BIC peak can be achieved at a frequency of 0.8217 terahertz(THz).Through multi-level expansion analysis,it is found that the electric dipole(ED)is the main factor contributing to the resonant characteristics of the structure.By leveraging the characteristics of BIC,an imaging system was created and operated.According to the simulation results,the imaging system demonstrated excellent sensitivity and resolution,revealing the great potential of terahertz imag-ing.This research not only provides new ideas for the creation of BIC structures but also offers an effective refer-ence for the development of high-performance terahertz imaging technology.
侯帅星;杨思嘉;沈云;邓晓华
南昌大学 物理与材料科学学院 物理系,江西 南昌 330031南昌大学 空间科学与技术研究院,江西 南昌 330031南昌大学 物理与材料科学学院 物理系,江西 南昌 330031南昌大学 空间科学与技术研究院,江西 南昌 330031
数理科学
超表面束缚态在连续体中太赫兹多级展开成像
metasurfacebound states in the continuumterahertzmulti-level expansionimaging
《红外与毫米波学报》 2026 (1)
90-96,7
Project supported by the National Natural Science Foundation of China(61927813,61865009,12104203),and Jiangxi Provincial Natu-ral Science Foundation(20212ACB201007)
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