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

被引：0

作者：

Zhang, Zeliang ^{[1
,2
]}

Qi, Pengfei ^{[1
,2
]}

Kosavera, Olga ^{[1
,3
]}

Deng, Minghui ^{[1
,2
]}

Gong, Cheng ^{[1
,2
]}

Lin, Lie ^{[1
,4
]}

Liu, Weiwei ^{[1
,2
]}

机构：

[1] Nankai Univ, Inst Modern Opt, Tianjin 300350, Peoples R China

[2] Tianjin Key Lab Microscale Opt Informat Sci & Tech, Tianjin 300350, Peoples R China

[3] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

[4] Tianjin Key Lab Optoelect Sensor & Sensing Network, Tianjin 300350, Peoples R China

来源：

CHINESE OPTICS LETTERS | 2024年 / 22卷 / 09期

基金：

中国国家自然科学基金;

关键词：

THz near field microscopy; nanotip; full-wave numerical simulation; PROBES; SPECTROSCOPY; TIPS;

D O I：

10.3788/COL202422.090002

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

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.

引用

页数：6

共 37 条

[1] Polarization effects in apertureless scanning near-field optical microscopy:: an experimental study [J].