太赫兹近场扫描显微成像的理论模拟研究
Theoretical simulation of terahertz near-field scanning microscopic imaging
周力 1胡翕甜 1吴旭1
作者信息
- 1. 上海理工大学 光电信息与计算机工程学院,上海 200093
- 折叠
摘要
太赫兹近场扫描成像系统突破了传统远场光学系统衍射极限的限制,可以实现太赫兹波段的超分辨检测与成像.基于太赫兹散射型扫描近场显微镜的工作原理,建立了一种基于COMSOL仿真软件的太赫兹散射型扫描近场显微镜系统的数值仿真模型,并通过该模型研究了探针由入射光激发而产生的避雷针效应和天线谐振效应,以及探针与样品之间的偶极效应.在此基础上,参照实际的扫描过程,实现了对蛋白分子的近场信号计算以及近场扫描成像.结果表明,该模型可以实现对三维立体物质的近场成像,在研究复杂的三维微纳米材料上具有应用潜力.
Abstract
Terahertz near-field scanning imaging system breaks through the limitation of the diffraction limit of the traditional far-field optical system and can achieve super-resolution detection and imaging in terahertz band.Based on the working principle of a scattering-type terahertz scanning near-field optical microscope,we established a numerical simulation model of a scattering-type terahertz scanning near-field optical microscope based on COMSOL and verified lightning rod effect and antenna resonance effect generated by the probe excited by incident light,as well as the dipole effect between the probe and the sample.On this basis,we implemented near-field signal calculation and near-field scanning imaging of protein molecules with reference to actual scanning processes.The results show that the model can achieve near-field imaging of three-dimensional materials and has application potential in the study of complex three-dimensional micro nano materials.
关键词
太赫兹/散射型扫描近场显微镜/COMSOL软件/有限元仿真Key words
terahertz/s-SNOM/COMSOL software/finite element simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据