2023/07/03 by Zeliang Zhang, Pengfei Qi, Zhang, Zeliang +9
Engineering · Materials Science · #FOS: Physical sciences #Nanowire Synthesis and Applications #Near-Field Optical Microscopy #Optics (physics.optics) #Quantum Dots Synthesis And Properties
paper · pdf · doi:10.48550/arxiv.2307.00742
openalex publication_date 2023/07/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This manuscript demonstrates the theory, design, and simulation of scattering scanning near field microscopy (s-SNOM) in 0.5THz. A comprehensive simulation model of nanotips' geometry, sample materials, and incident field is established to significantly improve the scattering efficiency and spatial resolution to achieve optimal performance. The theoretical model is based on full-wave simulation and dipole moment analysis which can describe the overall nanotip's geometry information to screen the optimal parameters corresponding to the 0.5THz, which is the center frequency of most THz sources. The customized nanotip can achieve 40 nm (λ/ 15000) spatial resolution while maintaining an excellent scattering efficiency. This nanotip design method doesn't depend on the homogenization commercial AFM tips, providing an approach for customized nanotip design of THz wave scattering near field microscopy.