南京大学学报（自然科学版）2025，Vol.61Issue(5)：829-834,6.DOI:10.13232/j.cnki.jnju.2025.05.011
超薄透射型声学编码超表面
Ultrathin transmissive acoustic coding metasurface
摘要
Abstract
In this paper,an ultrathin acoustic coding metasurface based on a coiling up structure is proposed.This structure is composed of 6×6 spatial coiling units,and the thickness of each unit is only one-tenth of the wavelength of the operating frequency.By adjusting the length of the transverse plate of the coiling structure,the phase of the transmitted sound wave can be effectively controlled,and the"0"and"1"digital coding of the units can be achieved.The coding units are arranged periodically in a certain order to form metasurfaces with different coding sequences,so as to effectively regulate the acoustic field beam.In order to verify the effectiveness of the metasurface designed in this paper,a coding metasurface is constructed by using 6×6 units,and the finite element simulation of the scattered acoustic field of the designed metasurface is carried out.The beam splitting effect on the transmitted sound wave is observed to confirm its acoustic performance.The simulation results show that the metasurface exhibits excellent performance at a frequency of 2 kHz,and can effectively realize different beam splitting functions.Our metasurface has a compact size and can be manipulated flexibly,which shows potential application prospect in acoustic detection,acoustic imaging and other fields.关键词
声学超表面/数字编码/声学超材料/波束分离Key words
acoustic metasurface/digital coding/acoustic metamaterials/beam splitting分类
数理科学引用本文复制引用
周浩,李澔翔,胡洁..超薄透射型声学编码超表面[J].南京大学学报（自然科学版）,2025,61(5):829-834,6.基金项目
国家自然科学基金(12374416) （12374416）
