Lei Chengxin, Chen Leyi, Tang Zhixiong, Li Daoyong, Cheng Zhenzhi, Tang Shaolong, Du Youwei
Opt Lett. 2016 Feb 15;41(4):729-32. doi: 10.1364/OL.41.000729.
The properties of optics and magneto-optical Faraday effects in a metal-dielectric tri-layer structure with subwavelength rectangular annular arrays are investigated. It is noteworthy that we obtained the strongly enhanced Faraday rotation of the desired sign along with high transmittance by optimizing the parameters of the nanostructure in the visible spectral ranges. In this system, we obtained two extraordinary optical transmission (EOT) resonant peaks with enhanced Faraday rotations, whose signs are opposite, which may provide the possibility of designing multi-channel magneto-optical devices. Study results show that the maximum of the figure of merit (FOM) of the structure can be obtained between two EOT resonant peaks accompanied by an enhanced Faraday rotation. The positions of the maximum value of the FOM and resonant peaks of transmission along with a large Faraday rotation can be tailored by simply adjusting the geometric parameters of our models. These research findings are of great importance for future applications of magneto-optical devices.
研究了具有亚波长矩形环形阵列的金属-介质三层结构中的光学性质和磁光法拉第效应。值得注意的是，通过在可见光谱范围内优化纳米结构的参数，我们获得了所需符号的强增强法拉第旋转以及高透射率。在该系统中，我们获得了两个具有增强法拉第旋转的异常光学传输（EOT）共振峰，其符号相反，这可能为设计多通道磁光器件提供了可能性。研究结果表明，在两个EOT共振峰之间可以获得结构的品质因数（FOM）最大值，同时伴随着增强的法拉第旋转。通过简单调整我们模型的几何参数，可以调整FOM最大值的位置、传输共振峰以及大的法拉第旋转。这些研究结果对于磁光器件的未来应用具有重要意义。
