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Title: | Deep-subwavelength control of acoustic waves in an ultra-compact metasurface lens | Authors: | Chen, Jian Xiao, Jing Lisevych, Danylo Shakouri, Amir Fan, Zheng |
Keywords: | Acoustic Waves Metasurface Lens DRNTU::Engineering::Mechanical engineering |
Issue Date: | 2018 | Source: | Chen, J., Xiao, J., Lisevych, D., Shakouri, A., & Fan, Z. (2018). Deep-subwavelength control of acoustic waves in an ultra-compact metasurface lens. Nature Communications, 9(1), 4920. doi:10.1038/s41467-018-07315-6 | Series/Report no.: | Nature Communications | Abstract: | Space-coiling acoustic metasurfaces have been largely exploited and shown their outstanding wave manipulation capacity. However, they are complex in realization and cannot directly manipulate acoustic near-fields by controlling the effective path length. Here, we propose a comprehensive paradigm for acoustic metasurfaces to extend the wave manipulations to both far- and near-fields and markedly reduce the implementation complexity with a simple structure, which consists of an array of deep-subwavelength-spaced slits perforated in a thin plate. A semi-analytical approach for such a design is established using a microscopic coupled-wave model, which reveals that the acoustic diffractive pattern at every slit exit is the sum of the initial transmission and the secondary scatterings of the coupled fields from other slits. For proof-of-concept, we examine two metasurface lenses for sound focusing within and beyond the diffraction limit. This work provides a feasible strategy for creating ultra-compact acoustic components with versatile potentials. | URI: | https://hdl.handle.net/10356/89115 http://hdl.handle.net/10220/47666 |
DOI: | 10.1038/s41467-018-07315-6 | Schools: | School of Mechanical and Aerospace Engineering | Rights: | © 2018 The Author(s). This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | MAE Journal Articles |
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Deep-subwavelength control of acoustic waves in an ultra-compact metasurface lens.pdf | 1.45 MB | Adobe PDF | View/Open |
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