Nanotip design for high-resolution terahertz scattering-type scanning near-field optical microscopy  

作　　者：Zeliang Zhang Pengfei Qi Olga Kosavera Minghui Deng Cheng Gong Lie Lin Weiwei Liu 张泽亮;齐鹏飞;Olga Kosavera;邓明慧;龚诚;林列;刘伟伟(Institute of Modern Optics,Nankai University,Tianjin 300350,China;Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China;Faculty of Physics,Lomonosov Moscow State University,Moscow 119991,Russia;Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China)

机构地区：[1]Institute of Modern Optics,Nankai University,Tianjin 300350,China [2]Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology,Tianjin 300350,China [3]Faculty of Physics,Lomonosov Moscow State University,Moscow 119991,Russia [4]Tianjin Key Laboratory of Optoelectronic Sensor and Sensing Network Technology,Tianjin 300350,China

出　　处：《Chinese Optics Letters》2024年第9期3-8,共6页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.12061131010 and 12074198).

摘　　要：Terahertz(THz)scattering-type scanning near-field optical microscopy(s-SNOM)is an important means of studying and revealing material properties at the nanoscale.The nanotip is one of the core components of THz s-SNOM,which has a decisive impact on the resolution of the system.In this paper,we focus on the theory and design of the nanotip and conduct comprehensive research on it through simulation.The theoretical model is based on full-wave numerical simulation and dipole moment analysis,which can describe the overall nanotip electromagnetic response under the incident field.A comprehensive design model of nanotip geometry,sample materials,and incident field is established to significantly improve the near-field coupling efficiency and spatial resolution to achieve optimal performance.

关 键 词：THz near field microscopy nanotip full-wave numerical simulation. 

分 类 号：TH742[机械工程—光学工程] TB383.1[机械工程—仪器科学与技术]