Tunable Band Gap in Piezoelectric Composite Rod Based on the Inter-Coupling Effect  

作　　者：Ze-Qun Fang Zhi-Lin Hou 方泽群;侯志林(School of Physics and Optoelectronics, South China University of Technology)

机构地区：[1]School of Physics and Optoelectronics, South China University of Technology

出　　处：《Chinese Physics Letters》2018年第5期60-64,共5页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 11274121

摘　　要：The longitudinal wave propagating in one-dimensional periodic piezoelectric composite rod with inter-coupling between different piezoelectric segments is investigated. The analytical formulae for such a structure are shown and the dispersion relation is calculated. The results show that, by introducing the inter-coupling between the different piezoelectric segments, which is accomplished by serially connecting every n piezoelectric segment into supercells, some tunable Bragg band gaps can accordingly be opened in the low frequency region. The investigation could provide a new guideline for the tunable phononic crystal under passive control.The longitudinal wave propagating in one-dimensional periodic piezoelectric composite rod with inter-coupling between different piezoelectric segments is investigated. The analytical formulae for such a structure are shown and the dispersion relation is calculated. The results show that, by introducing the inter-coupling between the different piezoelectric segments, which is accomplished by serially connecting every n piezoelectric segment into supercells, some tunable Bragg band gaps can accordingly be opened in the low frequency region. The investigation could provide a new guideline for the tunable phononic crystal under passive control.

关 键 词：UUT Tunable Band Gap in Piezoelectric Composite Rod Based on the Inter-Coupling Effect TP BG TN 

分 类 号：O735[理学—晶体学]