In this paper, a tunable plasmonic absorber composed of an elliptically grooved metallic film sandwiched between two dielectric layers is presented. To understand the optical response of the structure, its absorption spectrum and resonance modes profiles are numerically calculated using computer simulation technology microwave studio. It is shown that the proposed device can provide two absorption peaks, in the near-infrared region, with absorption coefficients dependent upon the polarization angle of the incident light. Therefore, using a Faraday rotator and applying a variable external magnetic field, the device can be converted into a tunable magneto-optic modulator. From a different point of view, the proposed device is applicable as a sensor to measure mechanical rotations from 0 to 90 degrees. Besides, it is discussed that by adding a graphene layer to the structure, a tunable dual band modulator is realized, by which two absorption bands can be adjusted independently. Sim...

中文翻译：

---

由椭圆形凹槽的周期性阵列组成的多功能可调双频等离子吸收器的建议

在本文中，提出了一种可调谐的等离子体吸收体，该吸收体由夹在两个介电层之间的椭圆形沟槽金属膜组成。为了了解该结构的光学响应，使用计算机仿真技术微波工作室对它的吸收光谱和共振模式分布进行了数值计算。结果表明，所提出的装置可以在近红外区域提供两个吸收峰，其吸收系数取决于入射光的偏振角。因此，使用法拉第旋转器并施加可变的外部磁场，可以将该设备转换为可调谐的磁光调制器。从不同的角度来看，所提出的装置可用作传感器，以测量从0到90度的机械旋转。除了，讨论了通过在结构上添加石墨烯层，实现了可调谐双频带调制器，通过该调制器可以独立地调节两个吸收频带。Sim ...