基于 toroidal 双极辅助 EIT 效应的双带传输极化转换元结构
Li Zeng1, Tao Zhang1, Hai-Feng Zhang1
1College of Electronic and Optical Engineering and the College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing, 210023, China. hanlor@njupt.edu.cn.
Nanoscale
|February 26, 2025
概括
本研究介绍了一种使用电磁诱导透明度 (EIT) 的极化转换 (PC) 的新型元结构. 该设备实现了高效的线性-循环偏振转换,具有低损失和稳定性,适用于各种应用.
科学领域:
- 超材料和纳米光子学
- 电磁学和光学 电磁学和光学
- 特拉赫兹技术的技术.
背景情况:
- 传输极化操纵装置对于卫星雷达和无线通信至关重要.
- 电磁诱导透明度 (EIT) 为高传输,低损耗光学现象提供了一条途径.
- 铁形二极体在先进的电磁反应中起着关键作用.
研究的目的:
- 展示一个用于极化转换 (PC) 的新元结构设计.
- 为了在传输模式中实现有效的线性到圆性的偏振转换.
- 探索极化操纵和光学过中的应用.
主要方法:
- 基于 toroidal 双极和 EIT 设计一个元结构.
- 模拟元结构对通常发生的x和y偏振波的反应,以识别EIT窗口.
- 分析设备在45°线性极化发生率下对线性到圆形PC的性能.
- 调查对宽角发生的强度.
主要成果:
- 超结构展示了两个不同的EIT窗口,最大传输率为0.94.
- 在0.935 THz和1.182 THz实现了有效的线性到圆性的偏振转换.
- 获得了低轴比 (1.22dB和1.18dB),并在广角冲击下保持了性能.
- 在大撞击角度下表现出低损耗和稳定性.
结论:
- 拟议的元结构有效地结合了圆形二极体,EIT和线性到圆形PC.
- 这种设计提供了一种低损失,稳定和高效的传输极化操纵方法.
- 这种创新方法为光学过,多极电磁和多功能设备提供了新的可能性.
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