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Multifrequency achromatic metalens realizing acoustic multi-point focusing.

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Title: Multifrequency achromatic metalens realizing acoustic multi-point focusing.
Authors: Yao, Jie1 (AUTHOR) yaojie1@njnu.edu.cn, Chen, Xing1 (AUTHOR), Dong, Shu-Ming1 (AUTHOR), Zhu, Xing-Feng1,2 (AUTHOR), Wu, Da-Jian1,2 (AUTHOR) wudajian@njnu.edu.cn
Source: Journal of the Acoustical Society of America. May2026, Vol. 159 Issue 5, p4459-4465. 7p.
Subjects: Phase modulation, Acoustic resonators
Abstract: Up to now, achromatic focusing techniques have focused on the design and improvement of single-point focusing, neglecting the wide application possibilities of multi-point focusing. Here, we propose a multifrequency achromatic metalens to achieve multiple focal points based on complex-amplitude coding. The complex-valued wavefront-shaping function is decomposed into two independent phase distributions, which are coded into the metalens through subwavelength units. The phase dispersion for multi-point focusing can be achieved in this way. Theoretical analyses predict that different coding sequences have little influence on the focal pattern, implying extra freedom in designing the metalens. Limited by available meta-atoms, achromatic multi-point focusing has been realized only at discrete frequencies in this study. By adjusting the coding carefully, a triple-frequency achromatic metalens has been constructed through space curved structures. Three achromatic focal points have been demonstrated through experiments at 3.5, 4, and 5 kHz. [ABSTRACT FROM AUTHOR]
Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 194178290
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Multifrequency achromatic metalens realizing acoustic multi-point focusing.
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  Data: <searchLink fieldCode="AR" term="%22Yao%2C+Jie%22">Yao, Jie</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yaojie1@njnu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chen%2C+Xing%22">Chen, Xing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dong%2C+Shu-Ming%22">Dong, Shu-Ming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+Xing-Feng%22">Zhu, Xing-Feng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wu%2C+Da-Jian%22">Wu, Da-Jian</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> wudajian@njnu.edu.cn</i>
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+the+Acoustical+Society+of+America%22">Journal of the Acoustical Society of America</searchLink>. May2026, Vol. 159 Issue 5, p4459-4465. 7p.
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  Data: <searchLink fieldCode="DE" term="%22Phase+modulation%22">Phase modulation</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustic+resonators%22">Acoustic resonators</searchLink>
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  Label: Abstract
  Group: Ab
  Data: Up to now, achromatic focusing techniques have focused on the design and improvement of single-point focusing, neglecting the wide application possibilities of multi-point focusing. Here, we propose a multifrequency achromatic metalens to achieve multiple focal points based on complex-amplitude coding. The complex-valued wavefront-shaping function is decomposed into two independent phase distributions, which are coded into the metalens through subwavelength units. The phase dispersion for multi-point focusing can be achieved in this way. Theoretical analyses predict that different coding sequences have little influence on the focal pattern, implying extra freedom in designing the metalens. Limited by available meta-atoms, achromatic multi-point focusing has been realized only at discrete frequencies in this study. By adjusting the coding carefully, a triple-frequency achromatic metalens has been constructed through space curved structures. Three achromatic focal points have been demonstrated through experiments at 3.5, 4, and 5 kHz. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of the Acoustical Society of America is the property of American Institute of Physics and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1121/10.0043924
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      – Code: eng
        Text: English
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        PageCount: 7
        StartPage: 4459
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        Type: general
      – SubjectFull: Acoustic resonators
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      – TitleFull: Multifrequency achromatic metalens realizing acoustic multi-point focusing.
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            NameFull: Yao, Jie
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            NameFull: Chen, Xing
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            NameFull: Dong, Shu-Ming
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
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