Extremely-huge wave localization in coupled multilayer heterogeneous phononic crystal resonators. (20th December 2018)

• Record Type: Journal Article
• Authors: Yang, Aichao; Lu, Caijiang; Wu, Fayuan; Wu, Yu; Zhu, Liang; Pei, Maolin; Liu, Ping; Li, Min; Dai, Xiaomin
• Is Part Of: Applied physics express. Volume 12:Number 1(2019)
• Publication Date: 2018-12-20
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/aaf220
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: A coupled heterogeneous structure consisting of multiple phononic crystal resonators (PCRs) is presented. Because of the acoustic coupling between PCRs, the extremely-huge wave localization effect is achieved in coupled multilayer heterogeneous phononic crystals, and the cavity pressure accordingly increases with the number of resonators. The numerical results obtained by finite element methods show that the proposed structure composed of five resonators exhibits ∼33.9 times larger maximum pressure amplification than a single conventional PCR with the same size. This proposed structure can be further used to enhance acoustic energy harvesting, acoustic sensing and sound concentration.