具有可调节焦点的三维全向声轨道角运动量发射器
Liulin Li1, Bingyi Liu1, Zhongyi Guo1
1School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China.
The Journal of the Acoustical Society of America
|August 27, 2025
概括
研究人员开发了一种使用级联离散声学镜头创建聚焦声 (FAV) 束的新方法. 这种技术允许3D焦点转换和拓电荷切换,为声学技术提供了成本效益的解决方案.
科学领域:
- 听力学
- 波动物理
- 光学工程
背景情况:
- 使用轨道角动量 (OAM) 的声波 (AV) 束提供了增强的通信能力和声波场工程能力.
- 开发高强度,低侧叶和高度定向的音频光束对于推进基于OAM的声学技术至关重要.
- 由于广泛使用活性成分,传统方法往往涉及高成本.
研究的目的:
- 提出一种具有可调节性质的聚焦声 (FAV) 束的新方法.
- 解决现有方法的局限性,特别是高成本和制造复杂性.
- 允许灵活控制FAV光束特性,包括焦点位置和拓电荷.
主要方法:
- 采用简化的部门传感器阵列与多个级联离散声学镜头 (DAL) 相结合.
- 在传感器前顺序放置具有指定相调节配置的DAL.
- 调整DAL定向角度允许3D焦点转换,同时调整传感器部门相位延迟可以实现拓电荷切换.
主要成果:
- 通过转换器阵列发射的AV光束的相调节成功生成了聚焦声 (FAV) 光束.
- 通过调整 DAL 定向角度,证明了焦点在全 3D 空间中的自由转换.
- 在焦点移动期间通过调整传感器部门相位延迟来实现FAV光束的拓电荷切换.
结论:
- 拟议的方法提供了一种成本效益和简化的方法,用于制造先进的声学应用的被动设备.
- 这种技术可以精确地控制FAV光束的特性,从而实现多样化的应用.
- 这种方法对粒子操纵和声通信技术具有重大潜力.
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