南京理工大学学报（自然科学版）2025，Vol.49Issue(2)：244-249,6.DOI:10.14177/j.cnki.32-1397n.2025.49.02.012
基于多焦点超表面透镜的折射率尺设计
Design of ruler-like refractometer based on multi-focal metasurface lens
摘要
Abstract
This paper presents a metasurface structure based on TiO2 nanopillar arrays on a SiO2 substrate for rapid and intuitive measurement of surrounding refractive index.By precisely controlling the position and angle of microstructural units,phase modulation of left-handed-circularly polarized light is achieved,thereby arbitrarily controlling the transmission wavefront.Experiments confirm the linear relationship between spatial refractive index and the position of the highest intensity focal line in the multi-focal metasurface lens,enabling real-time display of multi-focal focusing effects and real-time detection of refractive index changes.Therefore,it is called a ruler-like refractometer.The compact structure of this ruler-like refractometer facilitates integration with traditional portable devices,providing a new approach for the miniaturization and integration of optical measurement technology.关键词
超表面/多焦点聚焦/几何相位调控/折射率探测Key words
metasurface/multi-focal focusing/geometric phase modulation/refractive index detection分类
物理学引用本文复制引用
孔卓冉,安欣悦,孙文杰,陈漪恺,陆健..基于多焦点超表面透镜的折射率尺设计[J].南京理工大学学报（自然科学版）,2025,49(2):244-249,6.基金项目
江苏省自然科学基金(BK20170818) （BK20170818）
中央高校基本科研业务费专项资金(30923010907) （30923010907）
