太赫兹三层无色格子超表面波板的设计和分析
Ji Zhang1, Lan Ma1, Yandong Gong2
1Beijing Information Science and Technology University, Beijing, 100192, China.
Scientific reports
|February 14, 2025
概括
这项研究介绍了一种改进的嵌套优化过程,用于设计多层格子超表面波板. 新的三层结构实现了极化波的高效,无色转换在广的太赫兹频率范围内.
科学领域:
- 光学和光子学 在光学和光子学.
- 超材料是指一种超材料.
- 电磁主义 电磁主义
背景情况:
- 网格元面通过旋转的网格单元提供极化控制.
- 多层波板可以实现宽带调制,但面临复杂的优化.
- 在宽带宽上实现无色偏振转换仍然是一个挑战.
研究的目的:
- 为多层波板开发一个准确,快速的嵌套优化过程.
- 为了设计和优化一个新的三层格子 metasurface波形板.
- 为了在太赫兹范围内实现无色线性到左手圆极化转换.
主要方法:
- 改进了结合理论分析和电磁模拟的嵌套优化.
- 设计和优化一个三层格的 metasurface.
- 对极化转换机制和性能因素的分析.
主要成果:
- 一个新的三层格子元表面波板被优化.
- 从线性到左手循环偏振波的无色转换从0.8-1.8 THz实现.
- 网格结构的异质性和波向量合/共振效应被确定为关键性能驱动因素.
结论:
- 开发的嵌套优化过程是有效的多层波板设计.
- 三层格子超表面显示了超宽带无色极化控制的巨大潜力.
- 该研究提供了对制造先进光学应用的多层超表面的见解.
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