通过拓优化,使用3位编码元表面对声束进行增强的宽带操纵
Sheng-Dong Zhao1,2, Na-Li Zhang1, Ping Han1
1School of Mathematics and Statistics, Qingdao University, Qingdao, 266071, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|January 17, 2024
概括
这项研究引入了新的3位宽带反射声学编码元面 (BACMs),用于先进的声学操纵. 这些超表面为声通信等应用提供了对声波的精确控制.
科学领域:
- 声学 声学 在声学方面
- 材料科学 材料科学 材料科学
- 波浪物理 波浪物理
背景情况:
- 声学编码元面 (ACM) 通过可编程的编码序列为声波提供了多功能控制.
- 宽带功能增强了ACM的多功能性,使得与传统的超表面相比,用更少的单位实现更复杂的声学功能.
- 多位设计允许精确控制声波的相位.
研究的目的:
- 开发新的3位宽带反射声学编码元面 (BACMs),用于先进的声学操纵.
- 使用自下而上的拓优化方法系统地设计这些BACM.
- 探索它们在创造声波和操纵声波束方面的潜力.
主要方法:
- 用于系统设计3位BACM的自下而上的拓优化.
- 设计了8个编码单元,在广泛的频率范围内实现45°的相差.
- 使用卷积方法来构建旋聚焦和旋束操纵的元表面.
主要成果:
- 成功开发了8个编码单元的3位BACM.
- 在广的频率范围内的所有单元中证明恒定的45°相差.
- 构建声波旋元面,以及旋束操纵策略.
结论:
- 开发的3位BACM提供了对声波的精确控制,使复杂的功能.
- 这些超表面显示出在声学粒子悬浮和声学通信中的应用的巨大潜力.
- 设计方法有助于创建各种应用的先进声学设备.
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