报告题目：Decelerate Sound Wave with Acoustic Metamaterials

时间地点：2016年4月1日(周五)上午 10:00  田家炳南楼205

报 告 人：Prof. J. Zhu         (Department of Mechanical Engineering, Hong Kong Polytechnic University）

摘  要：How to slow down sound wave propagation is an interesting topic that not only matters about fundamental explorations of slow wave physics, but also will benefit a lot of applications. A successful solution will pave the way towards freewheeling sound manipulation. In this talk, we will introduce two different types of acoustic metamaterials that can actually slow down acoustic wave propagation through different physical mechanisms: one by high dispersion and another by refractive index tuning and wave-front revolution. Through simulation results and experimental output, we will present the exciting performance of such metamaterials and the fascinating things that they can do.

Selected papers:

1. P. Zhang, T. C. Li, J. Zhu (Co-first author), X. Zhu, S. Yang, Y. Wang, X. Yin & X. Zhang,  “Generation of acoustic self-bending and bottle beams by phase engineering”, Nature Communications, 5, 4316, 2014. 

2. J. Zhu, J. Christensen, J. Jung, L. Martin-Moreno, X. Yin, L. Fok, X. Zhang and F. J. Garcia-Vidal,“A holey-structured metamaterial for acoustic deep-subwavelength imaging”, Nature Physics, 7, 52,  2011.

Career Highlights:

 2014.7 � Present Assistant Professor (Hong Kong Polytechnic University)

 2008.8 � 2014.7 Post-Doctor Fellow, Associate Specialist, Acoustic Sub-group Leader  (University of California, Berkeley, CA)

 2004.7 � 2008.7 Ph.D. in Material Engineering (Pennsylvania State University)

Research Interests:

 ● General acoustics; Experimental acoustics.

 ● Structured Acoustic Materials and Metamaterials: mechanics and applications.

 ● Biomedical acoustic imaging technique and system.