CAAV Talk by Associate Professor Yun Jing

Towards advanced control of mechanical waves using meta-structures

Speaker A/Prof. Yun Jing, The Pennsylvania State University, USA

Hosted By Sipei Zhao

Abstract 
Meta-structures broadly refer to structures that gain their properties from tailored geometry and material composition, rather than from the parent materials themselves. In the realm of mechanical waves, meta-structure encompasses acoustic metamaterials/metasurfaces, elastic metamaterials/metasurfaces, and phononic crystals. These artificial materials, though have vastly different design principles, all possess unique and useful properties not found in natural materials, opening up opportunities for the development of new devices for managing mechanical waves. In this talk, I will give an overview of our recent research on meta-structures, with a focus on our investigation of non-Hermitian acoustic metasurfaces and quantum-inspired phononic crystals, where we study the acoustical analogs of condensed matter physics. Specifically, I will touch on a new design paradigm that harnesses intrinsic losses of acoustic metasurfaces to enrich their physics and wave behaviors. I will then discuss the recent developments of phononic crystals, which serve as an intriguing platform for showcasing concepts originally developed in topological physics, including topological insulators, Moiré flat bands, and topological defects. I will conclude the presentation by offering some insights into the future of this burgeoning field in acoustics.

Short Bio
Yun Jing, Ph.D. was a research fellow at Brigham and Women's Hospital, and an assistant professor and associate professor at North Carolina State University, prior to joining the Graduate Program in Acoustics at Penn State University in 2020. Dr. Jing has published over 85 peer reviewed scientific manuscripts. Dr. Jing is fellow of ASA, a senior member of IEEE, and an associate editor of the Journal of the Acoustical Society of America and Frontiers in Materials. He has received numerous awards such as the 2018 R. Bruce Lindsay Award from the Acoustical Society of America, the 2018 IEEE Ultrasonics Early Career Investigator award, 2018 MIT Technology Review Innovator under 35 China award, and the IEEE UFFC Star Ambassador Lectureship Award. Dr. Jing earned his B.S. in acoustics from Nanjing University, China, M.S., and Ph.D. in architectural acoustics from Rensselaer Polytechnic Institute.

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