完美的折射的整数多波长梯度相位转移:超细胞中的相位选择自由)
Jiaqi Quan1,2, Lin Xu3, Yangyang Fu4
1School of Physical Science and Technology, Soochow University, Suzhou 215006, China.
The Journal of the Acoustical Society of America
|November 1, 2024
概括
研究人员通过利用超级细胞中的相位选择自由来开发了多波长相位梯度元分级 (PGMs). 这一创新使PGM能够在多个频率上有效运行,克服单频的限制.
科学领域:
- 声学 声学 在声学方面
- 超材料是指一种超材料.
- 纳米光子学 纳米光子学
背景情况:
- 阶段梯度元分级 (PGM) 通过超细胞阶段增量和格衍射来操纵波浪.
- 由于精确的子细胞共振调,传统的PGM仅限于单频操作.
- 现有的设计专注于2π阶段增量,忽视了更广泛的阶段选择可能性.
研究的目的:
- 克服传统PGMs的单频限制.
- 探索在PGM超级电池中使用多-2π相位增量来实现多波长操作.
- 设计和演示一个能够在多个波长上运行的PGM.
主要方法:
- 研究了PGM超级细胞内相位选择的自由,特别是探索多-2π增量.
- 开发了一种涉及表面阻抗匹配和多波长子电池的协作机制.
- 设计和制造了一个超级电池,有八个曲的管道,用于两波长的操作.
主要成果:
- 由于阻抗匹配,实现了0.25π在3430Hz的线性相邻相梯度,并且由于阻抗匹配而具有近乎完美的传输.
- 在基本频率 (3430 Hz) 和其双倍频率 (6860 Hz) 均表现出一致的折射方向.
- 验证了设计的PGM的多波长功能.
结论:
- 超级电池的相位选择自由使得多波长PGM的设计成为可能.
- 拟议的设计策略和实验制造为先进的多波长元表面和元格提供了一条途径.
- 这项工作将PGM的运行能力扩展到单频应用之外.
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