Nobahar Davod, Barvestani Jamal
Faculty of Physics, University of Tabriz, Tabriz, 51666-16471, Iran.
Sci Rep. 2025 Mar 8;15(1):8132. doi: 10.1038/s41598-025-92740-z.
Magneto-optical (MO) metamaterials are a new degree of freedom in the modern technologies due to their pivotal role in paving way for appealing applications. In this paper, a new type of metamaterial composed of plasma and ferrite layers is proposed, and based on the matrix method and numerical calculations is characterized. It is identified that plasma-ferrite metamaterial (PFMM) exhibits a significant MO response with large polarization rotation angles and ellipticities in both reflection and transmission geometries. In some cases, the peak values of the Faraday and polar Kerr rotation angles exceed 40 degrees and demonstrate high sensitivity to changes in external parameters. Moreover, cross-polarization conversion effect and its adjustability under the influence of the external magnetic field and plasma number density in the vicinity of magnetic resonance frequency are verified. The results reveal that such multifunctional structure can provide opportunities for developing compact high-performance MO devices.
磁光(MO)超材料在现代技术中是一种新的自由度,因为它们在为吸引人的应用铺平道路方面起着关键作用。本文提出了一种由等离子体层和铁氧体层组成的新型超材料,并基于矩阵方法和数值计算对其进行了表征。研究发现,等离子体 - 铁氧体超材料(PFMM)在反射和透射几何结构中均表现出显著的磁光响应,具有大的偏振旋转角和椭圆率。在某些情况下,法拉第旋转角和极克尔旋转角的峰值超过40度,并对外界参数的变化表现出高灵敏度。此外,还验证了交叉偏振转换效应及其在磁共振频率附近受外部磁场和等离子体数密度影响时的可调性。结果表明,这种多功能结构可为开发紧凑的高性能磁光器件提供机会。