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Achromatic metasurfaces by dispersion customization for ultra-broadband acoustic beam engineering.

Publication ,  Journal Article
Dong, H-W; Shen, C; Zhao, S-D; Qiu, W; Zheng, H; Zhang, C; Cummer, SA; Wang, Y-S; Fang, D; Cheng, L
Published in: National science review
December 2022

Metasurfaces, the ultra-thin media with extraordinary wavefront modulation ability, have shown great promise for many potential applications. However, most of the existing metasurfaces are limited by narrow-band and strong dispersive modulation, which complicates their real-world applications and, therefore require strict customized dispersion. To address this issue, we report a general methodology for generating ultra-broadband achromatic metasurfaces with prescribed ultra-broadband achromatic properties in a bottom-up inverse-design paradigm. We demonstrate three ultra-broadband functionalities, including acoustic beam deflection, focusing and levitation, with relative bandwidths of 93.3%, 120% and 118.9%, respectively. In addition, we reveal a relationship between broadband achromatic functionality and element dispersion. All metasurface elements have anisotropic and asymmetric geometries with multiple scatterers and local cavities that synthetically support internal resonances, bi-anisotropy and multiple scattering for ultra-broadband customized dispersion. Our study opens new horizons for ultra-broadband highly efficient achromatic functional devices, with promising extension to optical and elastic metamaterials.

Duke Scholars

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Published In

National science review

DOI

EISSN

2053-714X

ISSN

2095-5138

Publication Date

December 2022

Volume

9

Issue

12

Start / End Page

nwac030

Related Subject Headings

  • 0703 Crop and Pasture Production
 

Citation

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Dong, H.-W., Shen, C., Zhao, S.-D., Qiu, W., Zheng, H., Zhang, C., … Cheng, L. (2022). Achromatic metasurfaces by dispersion customization for ultra-broadband acoustic beam engineering. National Science Review, 9(12), nwac030. https://doi.org/10.1093/nsr/nwac030
Dong, Hao-Wen, Chen Shen, Sheng-Dong Zhao, Weibao Qiu, Hairong Zheng, Chuanzeng Zhang, Steven A. Cummer, Yue-Sheng Wang, Daining Fang, and Li Cheng. “Achromatic metasurfaces by dispersion customization for ultra-broadband acoustic beam engineering.National Science Review 9, no. 12 (December 2022): nwac030. https://doi.org/10.1093/nsr/nwac030.
Dong H-W, Shen C, Zhao S-D, Qiu W, Zheng H, Zhang C, et al. Achromatic metasurfaces by dispersion customization for ultra-broadband acoustic beam engineering. National science review. 2022 Dec;9(12):nwac030.
Dong, Hao-Wen, et al. “Achromatic metasurfaces by dispersion customization for ultra-broadband acoustic beam engineering.National Science Review, vol. 9, no. 12, Dec. 2022, p. nwac030. Epmc, doi:10.1093/nsr/nwac030.
Dong H-W, Shen C, Zhao S-D, Qiu W, Zheng H, Zhang C, Cummer SA, Wang Y-S, Fang D, Cheng L. Achromatic metasurfaces by dispersion customization for ultra-broadband acoustic beam engineering. National science review. 2022 Dec;9(12):nwac030.
Journal cover image

Published In

National science review

DOI

EISSN

2053-714X

ISSN

2095-5138

Publication Date

December 2022

Volume

9

Issue

12

Start / End Page

nwac030

Related Subject Headings

  • 0703 Crop and Pasture Production