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With extraordinary properties unfound in natural materials, acoustic metamaterials are demonstrating a wide range of prospects from basic research to industrial applications based on artificial structural design. Starting from the Nobel Prize-winning topological physics, acoustic metamaterials are used to design and verify the quantum spin Hall effect, and provide design ideas for new acoustic devices with new topological mechanisms. In addition, based on causality principle, a series of ideas for designing artificial resonance structures have been developed, providing industrialized solutions for pipeline acoustics, such as air conditioners, vacuum cleaners and other application scenarios. Combined with spectrum customization and low-cost large-scale production and processing, acoustic metamaterials play an important role in future acoustic industry.

 

Graduated from HKUST in 2008 under the supervision of Prof. CT Chan, Prof. Zhihong Hang joined Soochow University in Suzhou, Jiangsu Province in 2012, and now he is a professor and associate dean in School of Physical Science and Technology. He also serves as the executive director of Institute for Advanced Study at Soochow University, founded by Nobel Prize Laureate in Physics, Prof. Michael Kosterlitz. His research interest mainly focuses on electromagnetic metamaterials and topological photonics, but today he is going to talk about his recent efforts on acoustics, both in topological physics and applications in ventilation systems.