Time:May 31, 2018 at 9:30 am
Title:Manipulation of sound waves by metamaterials
Speaker:Jiang Xue, Ph.D. jointly cultivated by the School of Physics, Nanjing University/University of California, Berkeley.
Report summary: The manipulation of sound waves has a wide range of important applications in people's daily life and industrial production. In recent years, acoustic metamaterials, with their sub-wavelength geometric characteristics and special acoustic properties, have greatly made up for the gap that natural materials cannot reach, providing broad application prospects for manipulating the trajectory of sound waves and designing acoustic devices with unique functions. Furthermore, the exploration of acoustic orbital angular momentum has increasingly become a research focus. As a brand new degree of freedom, the acoustic orbital angular momentum provides new possibilities for free manipulation of sound waves and shows significant application value in many fields. The report mainly introduces the research carried out on the combination of acoustic metamaterials and acoustic orbital angular momentum, including designing reflective and transmissive acoustic metasurfaces, designing broadband acoustic vortex transmitters based on spiral crack structures, and proposing to convert acoustic resonance into acoustic orbits The new physical mechanism of angular momentum proposes the application of acoustic orbital angular momentum as a new degree of freedom to acoustic multiplexing communication technology. The use of acoustic metamaterials to simultaneously realize the control of linear momentum and orbital angular momentum will greatly enrich the special control capabilities of sound waves, which is of great value in related fields.
Introduction：
Jiang Xue, female, Ph.D. jointly cultivated by the School of Physics of Nanjing University/University of California, Berkeley, and a visiting scholar at the National Center for Physical Acoustics. The main research direction is acoustic metamaterials, including the design of special acoustic structures to achieve free control of the acoustic wave front and acoustic orbital angular momentum. He has published 11 SCI papers as the first author, including Advanced Materials (impact factor 19.8), Physical Review Letters (top physics journals), Applied Physics Letters (4 papers, 1 cover article), etc. The research results have received extensive attention from the international physics and acoustics community many times, and have been specially reported by famous academic institutions such as American Physics Insitude, Scientific American, and Science Daily. Three representative papers have been rated as ESI highly cited papers, and the single most cited paper is 138 Times. 5 patents have been authorized or applied for. In 2016, he was invited to attend the Nobel Prize Winners Conference. Participated in many domestic and foreign conferences and made reports, including the International Conference on Electromagnetics Progress (winning the best report award), American Physics March Conference, American Acoustics Annual Conference, SPIE Smart Structure Symposium, 2017 International Metamaterials Conference, Chinese Society of Acoustics (Won the Best Report Award) etc. Won honors such as the "Three Good Students of Jiangsu Province", the "May Fourth Youth Medal" of Nanjing University, and the National Scholarship (3 times).
