Oskoui Abdol S, Shojaei S, Abdollahipour B
Faculty of Physics, University of Tabriz, Tabriz, 51666-16471 Iran.
Research Institute for Applied Physics and Astronomy (RIAPA), University of Tabriz, Tabriz, 51655-163 Iran.
Sci Rep. 2023 Aug 14;13(1):13169. doi: 10.1038/s41598-023-40460-7.
[Formula: see text] is one of the exciting and outstanding semimetallic members of TMDCs, which has attracted immense attention for manipulating light propagation due to its inherent optical anisotropy and hyperbolic characteristic in the infrared frequency range. We investigate the dependence of the reflectance and transmittance of structures with a single and double [Formula: see text] thin film in terms of frequency and polarization angle of the incident wave. We find rich behaviors in the optical response of these structures due to their anisotropic permittivity tensors. Furthermore, we analyze the polarization state of transmitted and reflected waves through these structures. We demonstrate that these structures provide the ability to achieve desired polarization rotation for outgoing waves by tuning the frequency and polarization angle of the incident wave with respect to the principal axes of [Formula: see text] thin film. In particular, we elucidate the essential relevance of the optical response and polarization rotation of the double thin film structure to the in-plain twist angle of [Formula: see text] thin films. We explain that this structure permits comprehensive control of the polarization rotation of the outgoing waves by adjusting the twist angle of thin films. The proposed structure can be employed as an efficient light manipulator with the aim of application in communication, imaging, and information processing.
[公式：见原文]是过渡金属二硫族化合物（TMDCs）中令人兴奋且杰出的半金属成员之一，由于其在红外频率范围内固有的光学各向异性和双曲线特性，在操纵光传播方面引起了极大关注。我们研究了具有单层和双层[公式：见原文]薄膜的结构的反射率和透射率随入射波频率和偏振角的变化。由于这些结构的各向异性介电常数张量，我们在它们的光学响应中发现了丰富的行为。此外，我们分析了通过这些结构的透射波和反射波的偏振态。我们证明，通过相对于[公式：见原文]薄膜的主轴调整入射波的频率和偏振角，这些结构能够为出射波实现所需的偏振旋转。特别是，我们阐明了双层薄膜结构的光学响应和偏振旋转与[公式：见原文]薄膜的面内扭转角之间的本质关联。我们解释说，这种结构通过调整薄膜的扭转角允许对出射波的偏振旋转进行全面控制。所提出的结构可以用作高效的光操纵器，旨在应用于通信、成像和信息处理。
