TY - JOUR
T1 - Coding Metasurface for Talbot Sound Amplification
AU - Gao, He
AU - Gu, Zhongming
AU - Liang, Shanjun
AU - An, Shuowei
AU - Liu, Tuo
AU - Zhu, Jie
N1 - Funding Information:
The work is supported by the National Natural Science Foundation of China (Grant No. 11774297) and the General Research Fund of Hong Kong RGC (Grant No. PolyU 152119/18E).
Publisher Copyright:
© 2020 American Physical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/25
Y1 - 2020/11/25
N2 - The Talbot effect has found profound applications in a wide variety of research fields, facilitating the development of sensing, imaging, and lithography, among others. Taking advantage of the flexibilities offered by the bidimensional Talbot effect, we propose and experimentally demonstrate a 2-bit coding acoustic metasurface lens. It is capable of arranging the far-field wave-energy distribution and thus tailoring the passive amplification of wave pattern at positions away from the source. By simply adjusting two different types of embedded helicoid units and their layout in the metasurface lens to change the coding sequences, the intensity amplification factor and period of the self-image can be manipulated simultaneously within the same imaging plane. The proposed Talbot lens allows flexible far-field sound redistribution and enhancement. Along with the nonresonant nature, it may open possibilities in applications such as acoustic communication, sonography, and signal processing.
AB - The Talbot effect has found profound applications in a wide variety of research fields, facilitating the development of sensing, imaging, and lithography, among others. Taking advantage of the flexibilities offered by the bidimensional Talbot effect, we propose and experimentally demonstrate a 2-bit coding acoustic metasurface lens. It is capable of arranging the far-field wave-energy distribution and thus tailoring the passive amplification of wave pattern at positions away from the source. By simply adjusting two different types of embedded helicoid units and their layout in the metasurface lens to change the coding sequences, the intensity amplification factor and period of the self-image can be manipulated simultaneously within the same imaging plane. The proposed Talbot lens allows flexible far-field sound redistribution and enhancement. Along with the nonresonant nature, it may open possibilities in applications such as acoustic communication, sonography, and signal processing.
UR - http://www.scopus.com/inward/record.url?scp=85097573647&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.14.054067
DO - 10.1103/PhysRevApplied.14.054067
M3 - Journal article
AN - SCOPUS:85097573647
SN - 2331-7019
VL - 14
JO - Physical Review Applied
JF - Physical Review Applied
IS - 5
M1 - 054067
ER -