Acoustic rainbow trapping by coiling up space

Xu Ni; Ying Wu; Ze-guo Chen; Li-Yang Zheng; Ye-Long Xu; Priyanka Nayar; Xiao-Ping Liu; Ming-Hui Lu; Yan-Feng Chen

doi:10.1038/srep07038

Acoustic rainbow trapping by coiling up space

Xu Ni, Ying Wu, Ze-guo Chen, Li-Yang Zheng, Ye-Long Xu, Priyanka Nayar, Xiao-Ping Liu, Ming-Hui Lu, Yan-Feng Chen

Research output: Contribution to journal › Article › peer-review

94 Scopus citations

Abstract

We numerically realize the acoustic rainbow trapping effect by tapping an air waveguide with space-coiling metamaterials. Due to the high refractive-index of the space-coiling metamaterials, our device is more compact compared to the reported trapped-rainbow devices. A numerical model utilizing effective parameters is also calculated, whose results are consistent well with the direct numerical simulation of space-coiling structure. Moreover, such device with the capability of dropping different frequency components of a broadband incident temporal acoustic signal into different channels can function as an acoustic wavelength division de-multiplexer. These results may have potential applications in acoustic device design such as an acoustic filter and an artificial cochlea.

Original language	English (US)
Journal	Scientific Reports
Volume	4
Issue number	1
DOIs	https://doi.org/10.1038/srep07038
State	Published - Nov 13 2014

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: The work was jointly supported by the National Basic Research Program of China (Grant No. 2012CB921503 and No. 2013CB632702) and the National Nature Science Foundation of China (Grant No. 1134006, No. 11474158, and No. 11404164). We also acknowledge the support from Academic Program Development of Jiangsu Higher Education (PAPD) and the support from the Fundamental Research Funds for the Central Universities.

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10.1038/srep07038

https://repository.kaust.edu.sa/bitstream/10754/336999/1/srep07038.pdf

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title = "Acoustic rainbow trapping by coiling up space",

abstract = "We numerically realize the acoustic rainbow trapping effect by tapping an air waveguide with space-coiling metamaterials. Due to the high refractive-index of the space-coiling metamaterials, our device is more compact compared to the reported trapped-rainbow devices. A numerical model utilizing effective parameters is also calculated, whose results are consistent well with the direct numerical simulation of space-coiling structure. Moreover, such device with the capability of dropping different frequency components of a broadband incident temporal acoustic signal into different channels can function as an acoustic wavelength division de-multiplexer. These results may have potential applications in acoustic device design such as an acoustic filter and an artificial cochlea.",

author = "Xu Ni and Ying Wu and Ze-guo Chen and Li-Yang Zheng and Ye-Long Xu and Priyanka Nayar and Xiao-Ping Liu and Ming-Hui Lu and Yan-Feng Chen",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The work was jointly supported by the National Basic Research Program of China (Grant No. 2012CB921503 and No. 2013CB632702) and the National Nature Science Foundation of China (Grant No. 1134006, No. 11474158, and No. 11404164). We also acknowledge the support from Academic Program Development of Jiangsu Higher Education (PAPD) and the support from the Fundamental Research Funds for the Central Universities.",

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doi = "10.1038/srep07038",

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AU - Ni, Xu

AU - Wu, Ying

AU - Chen, Ze-guo

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AU - Nayar, Priyanka

AU - Liu, Xiao-Ping

AU - Lu, Ming-Hui

AU - Chen, Yan-Feng

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: The work was jointly supported by the National Basic Research Program of China (Grant No. 2012CB921503 and No. 2013CB632702) and the National Nature Science Foundation of China (Grant No. 1134006, No. 11474158, and No. 11404164). We also acknowledge the support from Academic Program Development of Jiangsu Higher Education (PAPD) and the support from the Fundamental Research Funds for the Central Universities.

PY - 2014/11/13

Y1 - 2014/11/13

N2 - We numerically realize the acoustic rainbow trapping effect by tapping an air waveguide with space-coiling metamaterials. Due to the high refractive-index of the space-coiling metamaterials, our device is more compact compared to the reported trapped-rainbow devices. A numerical model utilizing effective parameters is also calculated, whose results are consistent well with the direct numerical simulation of space-coiling structure. Moreover, such device with the capability of dropping different frequency components of a broadband incident temporal acoustic signal into different channels can function as an acoustic wavelength division de-multiplexer. These results may have potential applications in acoustic device design such as an acoustic filter and an artificial cochlea.

AB - We numerically realize the acoustic rainbow trapping effect by tapping an air waveguide with space-coiling metamaterials. Due to the high refractive-index of the space-coiling metamaterials, our device is more compact compared to the reported trapped-rainbow devices. A numerical model utilizing effective parameters is also calculated, whose results are consistent well with the direct numerical simulation of space-coiling structure. Moreover, such device with the capability of dropping different frequency components of a broadband incident temporal acoustic signal into different channels can function as an acoustic wavelength division de-multiplexer. These results may have potential applications in acoustic device design such as an acoustic filter and an artificial cochlea.

UR - http://hdl.handle.net/10754/336999

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Acoustic rainbow trapping by coiling up space

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