Experimental evidence of quadrupolar whispering-gallery modes in phononic crystal based waveguides
Source abstract
Abstract
Understanding the performance of resonators introduced in elastic and/or acoustic circuits is important for conceiving complex and efficient guiding structures. In this work, we reported upon the experimental characterization of hollow pillars in different waveguides with 90° corners by measuring the displacement on top of hollow pillars. The air-coupled method, laser ultrasonic technique and the newly developed method based on polypropylene (PP) piezoelectret film have been adopted during this process. In such way, we experimentally show the quadrupolar resonance of hollow pillars that corresponds well to the whispering-gallery modes in numerical results in several types of waveguides for guiding Lamb wave.
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Research context
OpenAlex topics: Acoustic Wave Phenomena Research · Acoustic Wave Resonator Technologies · Ultrasonics and Acoustic Wave Propagation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Aerospace Engineering and Applied Mechanics, Tongji University 1 , 100 Zhangwu Road, 200092 Shanghai, China
Sorbonne Université, UPMC Université Paris 06, INSP UMR CNRS 7588 2 , 4 Place Jussieu, 75005 Paris, France
School of Physics Science and Engineering, Tongji University 3 , 1239 Siping Road, 200092, Shanghai, China
School of Science, Harbin Institute of Technology 4 , Shenzhen 518055, China
Funding
Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China
References (24)
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