Anomalous refraction of airborne sound through ultrathin metasurfaces

Kun Tang; Chunyin Qiu; Manzhu Ke; Jiuyang Lu; Yangtao Ye; Zhengyou Liu

doi:10.1038/srep06517

Anomalous refraction of airborne sound through ultrathin metasurfaces

Kun Tang, Chunyin Qiu, Manzhu Ke, Jiuyang Lu, Yangtao Ye, Zhengyou Liu

Wuhan University

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

335 Scopus citations

Abstract

Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. Good agreement has been demonstrated experimentally by a sample around the frequency 2.55 kHz, incident with a Gaussian beam at normal or oblique incidence. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls.

Original language	English
Article number	6517
Journal	Scientific Reports
Volume	4
DOIs	https://doi.org/10.1038/srep06517
State	Published - 1 Oct 2014
Externally published	Yes

Bibliographical note

Funding Information:
This work is supported by the National Natural Science Foundation of China (Grant Nos. 11174225, 11004155, 11374233, and J1210061); the National Basic Research Program of China (Grant No. 2015CB755500); the Open Foundation from State Key Laboratory of Applied Optics of China; and the Program for New Century Excellent Talents (NCET-11-0398).

Funding

This work is supported by the National Natural Science Foundation of China (Grant Nos. 11174225, 11004155, 11374233, and J1210061); the National Basic Research Program of China (Grant No. 2015CB755500); the Open Foundation from State Key Laboratory of Applied Optics of China; and the Program for New Century Excellent Talents (NCET-11-0398).

Funders	Funder number
Open Foundation from State Key Laboratory of Applied Optics of China
National Natural Science Foundation of China	11174225, J1210061, 11374233, 11004155
Program for New Century Excellent Talents in University	NCET-11-0398
National Key Research and Development Program of China	2015CB755500

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abstract = "Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. Good agreement has been demonstrated experimentally by a sample around the frequency 2.55 kHz, incident with a Gaussian beam at normal or oblique incidence. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls.",

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AU - Liu, Zhengyou

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N2 - Similar to their optic counterparts, acoustic components are anticipated to flexibly tailor the propagation of sound. However, the practical applications, e.g. for audible sound with large wavelengths, are frequently hampered by the issue of device thickness. Here we present an effective design of metasurface structures that can deflect the transmitted airborne sound in an anomalous way. This flat lens, made of spatially varied coiling-slit subunits, has a thickness of deep subwavelength. By elaborately optimizing its microstructures, the proposed lens exhibits high performance in steering sound wavefronts. Good agreement has been demonstrated experimentally by a sample around the frequency 2.55 kHz, incident with a Gaussian beam at normal or oblique incidence. This study may open new avenues for numerous daily life applications, such as controlling indoor sound effects by decorating rooms with light metasurface walls.

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Anomalous refraction of airborne sound through ultrathin metasurfaces

Abstract

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