Acoustic-electromagnetic slow waves in a periodical defective piezoelectric slab  

作　　者：李小娟 葛欢 范理 张淑仪 张辉 丁劲 

机构地区：[1]Laboratory of Modern Acoustics, Institute of Acoustics, Nanjing University

出　　处：《Chinese Physics B》2017年第7期207-211,共5页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2012CB921504);the National Natural Science Foundation of China(Grant Nos.11374154,10904067,and 11174142);the Natural Science Foundation of Jiangsu Province of China(Grant No.BK20151375);the Special Fund for Research in Quality Inspection of Public Welfare Industry,China(Grant No.201510068)

摘　　要：Coupled slow waves, slow acoustic waves, and electromagnetic waves are simultaneously achieved based on a piezoelectric material, in which a line defect is created within a honeycomb lattice array of cylindrical holes etched in a LiNbO3slab. Finite element simulations in frequency domain and time domain demonstrate that a highly localized slow mode is obtained in the defect. Owing to the piezoelectricity of LiNbO3, acoustic and electromagnetic waves are coupled with each other and transmit along the line defect. Therefore, in addition to a slow acoustic wave, an electromagnetic wave with a group velocity even lower than conventional acoustic waves is achieved.Coupled slow waves, slow acoustic waves, and electromagnetic waves are simultaneously achieved based on a piezoelectric material, in which a line defect is created within a honeycomb lattice array of cylindrical holes etched in a LiNbO_3 slab. Finite element simulations in frequency domain and time domain demonstrate that a highly localized slow mode is obtained in the defect. Owing to the piezoelectricity of LiNbO_3, acoustic and electromagnetic waves are coupled with each other and transmit along the line defect. Therefore, in addition to a slow acoustic wave, an electromagnetic wave with a group velocity even lower than conventional acoustic waves is achieved.

关 键 词：piezoelectric material phononic crystals group velocity slow wave 

分 类 号：O441.4[理学—电磁学] TM22[理学—物理]