Simultaneously focusing electromagnetic and acoustic waves by double-physical-fields null medium

被引：1
|
作者：
Wu, Boyang [1 ]
Sun, Fei [1 ]
Liu, Yichao [1 ]
Liu, Xin [1 ]
Zhao, Xiaodan [1 ]
Fei, Hongming [1 ]
Yang, Yibiao [1 ]
Chen, Zhihui [1 ]
Liang, Shaowei [2 ]
Wang, Zheng [2 ]
Wang, Bingjie [1 ]
机构：
[1] Taiyuan Univ Technol, Coll Elect Informat & Opt Engn, Key Lab Adv Transducers & Intelligent Control Syst, Minist Educ & Shanxi Prov, Taiyuan, Peoples R China
[2] China Blarus Belt & Rd Joint Lab Electromagnet Env, Taiyuan, Peoples R China
来源：
FRONTIERS IN MATERIALS | 2023年 / 10卷
基金：
中国国家自然科学基金;
关键词：
null medium; double-physical-fields lens; double-physical-fields focusing; surface transformation; transformation optics; ULTRASOUND; THERAPY;
D O I：
10.3389/fmats.2023.1229164
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A novel double-physical-fields lens that can simultaneously focus acoustic and electromagnetic waves into a given region is designed based on double-physical-fields null medium, which can be realized by metal plates with subwavelength separations/thicknesses and precisely designed lengths. Numerical simulations show the proposed double-physical-fields lens can create exactly the same focusing effect for both electromagnetic and acoustic waves, i.e., the same focal spot size and efficiency at the same focal length. Four typical lens with different output surfaces are studied, which shows different focusing characteristics, e.g., noodle-shaped focal spot, tiny focal spot, and capsule-shaped focal spot. With the help of the designed double-physical-fields lens, an additional degree of freedom for control can be provided by simultaneously focusing acoustic and electromagnetic waves, which may lead to wider range of applications than single-field focusing.
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页数：9
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