Achromatic transmitted acoustic lens arrayed by cascaded Helmholtz resonators

被引：2
|
作者：
Lu, Cheng [1 ]
Tang, Shuai [1 ]
Wu, Jin-Lei [2 ]
Pei, Yanbo [1 ]
Jiang, Yongyuan [1 ,3 ,4 ,5 ]
机构：
[1] Harbin Inst Technol, Sch Phys, Harbin 150001, Peoples R China
[2] Harbin Inst Technol, Dept Optoelect Sci, Weihai 264209, Peoples R China
[3] Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Peoples R China
[4] Key Lab Microopt & Photon Technol Heilongjiang Pr, Harbin 150001, Peoples R China
[5] Minist Ind & Informat Technol, Key Lab Micro Nano Optoelect Informat Syst, Harbin 150001, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2023年 / 16卷 / 01期
基金：
中国国家自然科学基金;
关键词：
acoustic metasurface; acoustic focusing; achromatic lens;
D O I：
10.35848/1882-0786/acb3ae
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
By utilizing an array of cascaded Helmholtz resonators (HRs) with high transmittance and linear phase response, a broadband achromatic acoustic lens (AAL) is realized and verified in numerical simulations as well as experimental measurements. The focal length is independent of the incident frequencies from 2000 to 4500 Hz owing to the phase compensation provided by HR arrays. The FWHM of the focal point could remain approximately half of the wavelength within the operating band, showing an excellent performance of the lens. This work enriches the design of AAL, which may have potential applications in biomedical imaging and acoustic detection.
引用
收藏
页数：7
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