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结构调制Au/BYIG磁性-等离子晶体,以获得高效的法拉第效应和折射率检测

Yuchen Fei¹, Xuanli Zheng¹, Guoqing Zeng¹

¹Engineering Research Center of Micro-nano Optoelectronic Materials and Devices, Ministry of Education, Fujian Key Laboratory of Semiconductor Materials and Applications, CI Center for OSED, Department of Physics, Xiamen University, Xiamen 361005, People's Republic of China.

Journal of physics. Condensed matter : an Institute of Physics journal

|December 12, 2025

概括

这项研究探讨了结构设计如何影响磁性等离子晶体 (MPC). 几何参数显著影响磁光 (MO) 特性,指导先进的MO设备和等离子体传感器的开发.

科学领域:

塑学和光子学的研究.
磁光学光学是一种磁性光学.
材料科学材料科学材料科学

背景情况:

磁性等离子晶体 (MPC) 对于先进的光学应用至关重要.
了解MPC结构和磁光 (MO) 特性之间的联系是有限的.
当前的研究往往忽略了对几何参数对法拉第效应影响的系统分析.

研究的目的:

系统地研究结构参数对MPC非同寻常的光学传输和MO特性的影响.
分析薄膜厚度,孔径,形状,周期和排列如何影响法拉第旋转和电场分布.
阐明MPC中法拉第效应背后的机制,并优化设备性能.

主要方法:

使用有限差异时间域 (FDTD) 方法进行数值调查.
对MPCs的分析,MPCs包括一个穿孔的金 (Au) 薄膜在一个石替代的伊铁石榴石层上.
系统评估各种几何配置,包括单孔和双孔 (圆形/方形) 的单元细胞.

主要成果:

最佳的单孔阵列 (圆形) 实现了27.3%的传输和0.69°法拉第旋转.
双孔阵列,特别是带有方形孔的阵列,对于折射率传感显示出增强的灵敏度 (174.61 nm/RIU).
表面等离子体极子和局部表面等离子体共振之间的增强合被确定为改善MO性能的关键.

结论:

结构几何学批判性地决定了MO应用和传感的MPC性能.
单孔阵列为MO应用提供了卓越的优点.
双孔阵列为环境传感提供了更高的灵敏度,为定制的MPC设备提供了设计指南.

关键词:

法拉第效应就是法拉第效应.磁性等离子体晶体的磁性等离子体晶体摄影探测器的光检测器表面等离子体表面等离子体

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