人工晶体学报2017，Vol.46Issue(2)：381-384,4.
基于有限元法与超胞法的结构声表面波缺陷态分析
Analysis of Defect States for Spoof Surface Acoustic Waves Based on Finite Element Method and Supercell Method
摘要
Abstract
The point defect and line defect band structure of spoof surface acoustic waves were calculated by the finite element method and the supercell method,and acoustic confinement and waveguiding of surface phononic crystals with defect states were analyzed theoretically.The surface phononic crystal is composed of rigid surface with periodic grooves.Point defects and line defects can be introduced by changing the geometrical parameters of single groove in the core center or one row of grooves.Furthermore,combining the finite element method and the supercell method,it is very convenient to calculate the band structure of point defects and line defects,and obtain the eigen-pressure field of spoof surface acoustic waves which localized in the point defects and the line defects with specific frequency.By analyzing the defect band structure and eigen-pressure field diagram,we can intuitively understand the acoustic confinement and acoustic waveguides in the surface phononic crystal with defect states.关键词
声表面波/声限制/声波导/有限元/超胞法Key words
surface acoustic wave/acoustic confinement/acoustic waveguiding/finite element/supercell method分类
数理科学引用本文复制引用
谢素君,欧阳仕粮,邓科,赵鹤平..基于有限元法与超胞法的结构声表面波缺陷态分析[J].人工晶体学报,2017,46(2):381-384,4.基金项目
国家自然科学基金(11564012,11464012,11304351) （11564012,11464012,11304351）
湖南省自然科学基金(2016JJ2100) （2016JJ2100）
湖南省教育厅科研项目(16A170) （16A170）
吉首大学校级课题(15JDY030,JGY201646) （15JDY030,JGY201646）
