Published in

American Institute of Physics, Applied Physics Letters, 6(108), p. 063501, 2016

DOI: 10.1063/1.4941664

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Precise rainbow trapping for low-frequency acoustic waves with micro Mie resonance-based structures

Journal article published in 2016 by Chen Zhou, Baoguo Yuan, Ying Cheng ORCID, Xiaojun Liu
This paper is available in a repository.
This paper is available in a repository.

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Data provided by SHERPA/RoMEO

Abstract

We have realized the acoustic rainbow trapping in the low frequency region (200–500 Hz) through micro Mie resonance-basedstructures. The structure has eight channels with a high refractive index obtained by coiling space, that can excite strong interactions with incident waves and support various orders of multipoles due to the Mie resonances of the microstructure. By utilizing the structure, the precise spatial modulation of the acoustic wave is demonstrated both theoretically and experimentally. The effect of trapping broadband acoustic waves and spatially separating different frequency components are ascribed to the monopolar Mie resonances of the structures. The trapping frequency is derived and the trapping positions can be tuned arbitrarily. With enhanced wave-structure interactions and tailored frequency responses, such micro structures show precise spectral-spatial control of acoustic waves and open a diverse venue for high performance acoustic wave detection, sensing, filtering, and a nondestructive test.