单壁碳纳米管太赫兹超表面窄带吸收及其传感特性
Narrow band absorption and sensing properties of the THz metasurface based on single-walled carbon nanotubes
摘要
Abstract
Due to their excellent electrical and optical properties,carbon nanotubes have broad application prospects in the field of optoelectronics.In this work the vacuum filtration method is used to obtain an isotropic single-walled carbon nanotube film by the dispersion of single-walled carbon nanotube powder through vacuum filtration;on the basis of extracting the dielectric parameters of the thin film in a range from 0.4 to 2.0 THz,a novel terahertz metasurface narrowband absorber based on single-walled carbon nanotube films is designed and prepared.This metasurface absorber is composed of square and I-shaped narrow slot resonators.The experimental and simulation results show that the proposed terahertz metasurface absorber exhibits four distinct resonance absorption peaks at 0.65,0.85,1.16,and 1.31 THz,respectively,achieving a perfect absorption of up to 90%.The absorption mechanism of this novel multi band terahertz metasurface is elucidated by using the theory of multiple reflection interference.By covering dielectric layers with different refractive indices on the surface of metasurface device,the sensing performance of metasurface acting as refractive index sensor is studied in depth.The research results indicate that this new type of metasurface absorber has high sensitivity for refractive index sensing,providing new ideas and solutions for further developing carbon-based new terahertz metasurface absorbers.关键词
单壁碳纳米管薄膜/太赫兹/超表面/折射率传感Key words
single-walled carbon nanotube thin film/terahertz/metasurface/refractive index sensor引用本文复制引用
张向,王玥,张婉莹,张晓菊,罗帆,宋博晨,张狂,施卫..单壁碳纳米管太赫兹超表面窄带吸收及其传感特性[J].物理学报,2024,73(2):189-197,9.基金项目
国家自然科学基金(批准号:61975163)、陕西省重点研发计划(批准号:2023GXLH-038)、陕西省青年创新团队建设项目(批准号:21JP084)、西安市科技局重点产业链关键核心技术攻关项目(批准号:23LLRH0057)、西安理工大学博士学位论文创新基金和陕西省自然科学基金(批准号:2020JZ-48)资助的课题. Project supported by the National Natural Science Foundation of China(Grant No.61975163),the Key Research and Development Program of Shaanxi Province,China(Grant No.2023GXLH-038),the Youth Innovation Research Team of Shaanxi Higher Education Universities,China(Grant No.21JP084),the Key Core Technology Research Project for Strategic Industry Chains of Xi'an Science and Technology Bureau,China(Grant No.23LLRH0057),the Doctoral Dissertation Innovation Fund of Xi'an University of Technology,China,and the Natural Science Foundation of Shaanxi Province,China(Grant No.2020JZ-48). （批准号:61975163）
