VALLEY-PROTECTED BACKSCATTERING SUPPRESSION OF ELASTIC WAVE IN TWO-DIMENSIONAL SOLID PHONONIC CRYSTALS

摘要：

　　Inspired by the discovery of novel topological orders of condensed matters, topologically protected edge wave propagation in phononic crystals now is attracting great attention.In this paper, a new kind of solid phononic crystal based on the regular honeycomb lattice with circular rods connected by slender veins is designed.By changing the diameter of the two adjacent circular rods, topological transition has been realized.The vortex chirality of the bulk valley modes with opposite angular momentum is unveiled.Valley dependent edge states and the associated valley-protected backscattering suppression around Z-shape bend waveguide have been demonstrated.In our further work, a real device will be manufactured and tested to verify the results experimentally.

关键词： Solid phononic crystals Elastic wave Valley-protected Backscattering suppression

作者: Xiang XIE Hong-lang LI Qiu-yun FU Xue-feng ZHU Wei LUO

作者单位: School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 4 Institute of Acoustics, Chinese Academy of Sciences No.21, Bei-Si-huan-Xi Road, Beijing 100190, Chin School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 4 School of physics and Innovation Institute, Huazhong University of Science and Technology, Wuhan, Hu

会议类型: 国际会议

会议名称: The 2017 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2017全国压电和声波理论及器件技术研讨会)

会议地点: 成都

会议语种:英文

页码: 183-186

在线出版日期: 2017-10-27（万方平台首次上网日期，不代表论文的发表时间）