具有可切换的偏振转换,多频段吸收和可编程的散射控制的动态重新配置的石墨烯-二氧化元表面.
Hiranmay Mistri1, Abdur Rahaman Sardar2, Anumoy Ghosh3
1Dept. of ECE, Ramkrishna Mahato Government Engineering College, Purulia, Purulia-723103, West Bengal, India. hiranmaymistri@rkmgec.ac.in.
Physical chemistry chemical physics : PCCP
|March 10, 2026
概括
这项研究提出了一个可重新配置的石墨烯-二氧化瓦尼元表面. 它提供可切换的极化转换,宽带吸收和雷达截面减小,用于先进的电磁应用.
科学领域:
- 超材料和纳米光子学
- 特拉赫兹 (THz) 技术技术
- 电磁兼容性 (EMC) 是指电磁兼容性.
背景情况:
- 超表面通过工程化亚波长结构提供独特的电磁性质.
- 对于多功能设备来说,超表面性质的动态可调性至关重要.
- 二氧化瓦纳 (VO2) 和石墨烯是积极控制电磁波的有希望的材料.
研究的目的:
- 为了展示一个动态重新配置的多功能石墨烯-VO2元表面.
- 为了实现可切换的极化转换 (线性到圆形和线性到线性).
- 实现宽带和窄带吸收和雷达截面 (RCS) 减少.
主要方法:
- 一个超表面单元细胞的制造,其中包括在SiO2基板上的石墨烯补丁与VO2地面层.
- 利用温度和石墨烯表面潜力,在绝缘和金属相之间切换VO2.
- 数字模拟分析极化转换,吸收和RCS降低跨太赫兹频率.
主要成果:
- 通过调整石墨烯,实现了宽带线性到圆性的极化转换 (56.69% FBW) 和线性到线性的交叉极化转换 (63.63% FBW).
- 观察到6个吸收频段,从1.72到10.32 THz,在绝缘阶段的峰值吸收率高达95.61%.
- 在两种VO2阶段都证明了显著的单静态RCS降低 (>20dB) 和宽带双静态RCS降低,具有良好的角度稳定性.
结论:
- 石墨烯-VO2超表面为THz模式下电磁波的动态控制提供了一个多功能平台.
- 该设备具有多功能功能,包括可切换的偏振转换,高效吸收和隐形应用.
- 拟议的设计显示了需要可重新配置的电磁响应的先进THz设备的潜力.
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