Experimental verification of the acoustic geometric phase
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影响因子：3.971
DOI码：10.1063/5.0091474
发表刊物：Applied Physics Letters
关键字：Nonlocal Metagrating; Geometric Phase; Orbital Angular Momentum; Acoustic Vortex
摘要：Optical geometric phase encoded by in-plane spatial orientation of microstructures has promoted the rapid development of numerous functional meta-devices. However, pushing the concept of the geometric phase toward the acoustic community still faces challenges. In this work, we utilize two acoustic nonlocal metagratings that could support a direct conversion between an acoustic plane wave and a designated vortex mode to obtain the acoustic geometric phase, in which an orbital angular momentum conversion process plays a vital role. In addition, we realize the acoustic geometric phases of different orders by merely varying the orientation angle of the acoustic nonlocal metagratings. Intriguingly, according to our developed theory, we reveal that the reflective acoustic geometric phase, which is twice the transmissive one, can be readily realized by transferring the transmitted configuration to a reflected one. Both the theoretical study and experimental measurements verify the announced transmissive and reflective acoustic geometric phases. Moreover, the reconfigurability and continuous phase modulation that covers the 2πrange shown by the acoustic geometric phases provide us with the alternatives in advanced acoustic wavefront control.
合写作者：Zhilin Zhou,Yongtian Wang,Thomas Zentgraf
第一作者：Bingyi Liu
论文类型：期刊论文
通讯作者：Yong Li,Lingling Huang
论文编号：000804998900005
文献类型：J
卷号：120
期号：21
页面范围：211702
ISSN号：ISSN 0003-6951
是否译文：否
发表时间：2022-05-26
收录刊物：SCI