题目：Surface and interface elastic waves in phononic crystals and metamaterials
报告人：Prof. Chuanzeng Zhang （University of Siegen, Germany）
时间：2018年8月20日15:00-16:00
报告地点：明故宫校区A18-807
主办单位：机械结构力学及控制国家重点实验室、国际合作处、科协、航空宇航学院
报告摘要：
Surface/interface waves at the interface of two dissimilar media play an important role in science and technology, as they exhibit rich physics and potential applications in both optical and acoustic systems. One type of such surface/interface wave modes can be observed at the interface between dissimilar photonic crystals or metamaterials. The interface elastic wave mode is the elastic analog of its optical and acoustic counterparts. However, compared with the optical and acoustic systems, the investigations of the surface/interface elastic waves in phononic crystals and elastic metamaterials are quite limited and rarely reported in literature. In this talk, the surface/interface elastic waves propagating along the interfaces between a semi-infinite homogeneous background medium and a semi-infinite phononic crystal or elastic metamaterial will be presented. Numerical examples demonstrate that the surface/interface elastic waves decay rapidly into the phononic crystal (elastic metamaterial) or the homogeneous medium, and can be tuned by changing the geometrical configuration of the interfaces. A cavity which can confine the interface elastic waves is proposed. It is shown that the interface wave mode cavity can couple with other bulk wave modes, which may provide a new way for designing integrated phononic circuits. Moreover, the interface elastic waves can be utilized in many challenging applications, such as energy harvesting, sensing and collimation.
报告人简介：
张传增教授主要从事的科研领域包括智能材料与结构力学、功能梯度材料与结构力学、压电和磁电弹材料力学分析、弹性动力学、断裂动力学、计算力学、计算机仿真。张传增教授2015年获得Du Qinghua Medal & Awards of Computational Methods in Engineering。张传增教授现为德国最高级别C4教授，德国锡根大学土木工程系系主任，英国威塞克斯技术学院客座研究员，同济大学兼职教授，哈尔滨工业大学客座教授，哈尔滨工程大学客座教授，澳门大学资深客座教授(2010-2011)，南京航空航天大学客座教授，中国建筑材料科学研究总院客座教授。2014年11月当选为欧洲科学院院士(European Academy of Sciences)，2015年1月被授予斯洛伐克工业大学荣誉博士(Doctor Honoris Causa或简称Dr. h. c.)，2015年9月当选为欧洲科学与艺术院院士(European Academy of Sciences)，2016年6月当选为欧洲人文与自然科学院院士(Academia Europaea)。国际著名力学专家。
