Nanofabrication mechanism of λ/20 features achieved by coupling field tip enhancement induced with nanosecond laser irradiating AFM probe tip

被引:3
作者
Yin, Hailong [1 ]
Cui, Jianlei [1 ]
Wang, Xuewen [1 ]
Ren, Xiaoying [1 ]
Zhang, Jianwei [1 ,3 ]
Mei, Huanhuan [1 ]
Xu, Kaida [2 ]
Mei, Xuesong [1 ]
机构
[1] Xi An Jiao Tong Univ, State Key Lab Mfg Syst Engn, Xian 710049, Peoples R China
[2] Xi An Jiao Tong Univ, Sch Informat & Commun Engn, Xian 710049, Peoples R China
[3] Qilu Univ Technol, Shandong Acad Sci, Inst Oceanog Instrumentat, Qingdao 266061, Peoples R China
基金
中国国家自然科学基金;
关键词
Finite element simulation; Coupling field tip enhancement; Nanofabrication; Laser; Probe tip; NEAR-FIELD; RAMAN-SPECTROSCOPY; MICROSCOPY; SIMULATIONS; EXCITATION; SCATTERING; METALS;
D O I
10.1016/j.apsusc.2022.155065
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The nanofabrication mechanism of coupling field tip enhancement induced by laser-irradiated probe tip was investigated theoretically and experimentally. The coupling mechanisms and distribution characteristics of the enhanced electric, thermal, and stress fields were studied at wavelengths of 400-800 nm and tip-sample dis-tances of 1-20 nm for 9 material combinations. The simulation results demonstrated that the electro-thermal coupling effect and thermal-mechanical coupling effect are the basic principles of this technique, independent of the materials. It was also demonstrated that probe damage due to mechanical scratching can be avoided through the estimation of probe displacement. The superposition of electromagnetic energy and thermal energy generates an extremely constrained total energy of up to 10-12 orders of magnitude near the tip end. The nano -line structures were processed at each tip-sample distance, and nanostructures with a feature size of approxi-mately lambda/20 were obtained. The experimental results and the total energy distribution demonstrated that the interaction of the coupling field tip enhancement with samples is in the form of total energy deposits on ma-terials. The significance of this study will not only enable a refined understanding of the fundamental physics of surface nanostructuring but will also advance the scientific and industrial applications of the technology.
引用
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页数:11
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