Frequency-Coded Passive Multifunctional Elastic Metasurfaces

Rong, Junjie1,2; Ye, Wenjing1; Zhang, Shengyuan1; Liu, Yijun3

2020-09-11

10.1002/adfm.202005285

ADVANCED FUNCTIONAL MATERIALS   影响因子和分区

1616-301X

1616-3028

As an emerging material, metasurfaces open the door to a wide range of applications based on ultrasonic and elastic waves. However, most of the existing elastic metasurfaces have a fixed functionality and operate at a fixed frequency, which make them difficult to adapt to changing working requirements and/or environments. Although several recently proposed reconfigurable designs can relax this limitation, they either need laborious tuning or complex active control systems. In this work, by encoding multiple functionalities onto a single metasurface through operation frequencies, passive metasurfaces with switchable multifunctionalities are proposed and realized. Different wave manipulation functions of a single metasurface can be switched from one to another simply by changing the operation frequency. The design of these metasurfaces is realized using a systematic design approach based on topology optimization. Frequency-coded multiple elastic wave manipulation functions, including wave beam steering and focusing, are numerically and experimentally demonstrated. Good agreement between the numerical simulations and experimental measurements is achieved. The proposed design strategy significantly enhances the functionalities and adaptivity of metasurfaces, moving them closer towards real-world applications.

elastic wave manipulation inverse designs metamaterials multifunctional metasurfaces

SCI ; EI

英语

NI期刊

其他

Hong Kong Research Grants Council[16212318] ; National Natural Science Foundation of China[11972179]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000568008100001

WILEY-V C H VERLAG GMBH

20203809181564

Mechanics:931.1

MATERIALS SCIENCE

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Mech & Aerosp Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China
2.Northwestern Polytech Univ, Sch Astronaut, Xian 710072, Shaanxi, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Aerosp Engn, Shenzhen 518055, Peoples R China

Rong, Junjie,Ye, Wenjing,Zhang, Shengyuan,et al. Frequency-Coded Passive Multifunctional Elastic Metasurfaces[J]. ADVANCED FUNCTIONAL MATERIALS,2020,30(50).

Rong, Junjie,Ye, Wenjing,Zhang, Shengyuan,&Liu, Yijun.(2020).Frequency-Coded Passive Multifunctional Elastic Metasurfaces.ADVANCED FUNCTIONAL MATERIALS,30(50).

Rong, Junjie,et al."Frequency-Coded Passive Multifunctional Elastic Metasurfaces".ADVANCED FUNCTIONAL MATERIALS 30.50(2020).