In search of next-generation optical information functional materials, magneto-optical microstructures have attracted great attention since they can break Kirchhoff’s law and produce higher photoelectric conversion efficiency. Theoretical studies using finite-difference time-domain and transfer matrix methods have been performed to investigate the optical properties of magneto-optical microstructures. However, these methods are computationally intensive and require periodic conditions, which may not be satisfied with most fabricated samples. The equivalent medium algorithm is improved to make it suitable for the equivalent of magneto-optical materials. Based on the improved equivalent medium theory (EMT), a magneto-optical InSb film structure doped with Au particles (D-InSb) is designed. The effective dielectric functions of the D-InSb layer for transfer matrix waves are obtained from the Bruggeman approximation. Thin-film optics formulas incorporating the anisotropic wave propagation in uniaxial media are employed to calculate the nonreciprocal absorptance of the D-InSb film. The effect of geometric parameters, such as filling ratio and number of layers, is investigated. In addition to modeling the directional radiative properties at various angles of incidence, the hemispherical properties are also calculated to understand the light absorption. The results of our study can provide methods and ideas for the design of solar cells, infrared absorbers, and optical isolators.

中文翻译：

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基于有效介质理论的金属粒子掺杂磁光薄膜的不可逆光学特性

在寻找下一代光信息功能材料的过程中，磁光微结构因其能够打破基尔霍夫定律并产生更高的光电转换效率而备受关注。已经进行了使用时域有限差分和传递矩阵方法的理论研究，以研究磁光微结构的光学特性。然而，这些方法计算量大且需要周期性条件，这可能无法满足大多数制造样本的要求。改进了等效介质算法，使其适用于磁光材料的等效。基于改进的等效介质理论（EMT），设计了一种掺杂Au粒子（D-InSb）的磁光InSb薄膜结构。D-InSb 层对传输矩阵波的有效介电函数是从 Bruggeman 近似获得的。采用结合单轴介质中各向异性波传播的薄膜光学公式来计算 D-InSb 薄膜的单向吸收率。研究了填充率和层数等几何参数的影响。除了对不同入射角的定向辐射特性进行建模外，还计算了半球特性以了解光吸收。我们的研究结果可为太阳能电池、红外吸收器和光隔离器的设计提供方法和思路。采用结合单轴介质中各向异性波传播的薄膜光学公式来计算 D-InSb 薄膜的单向吸收率。研究了填充率和层数等几何参数的影响。除了对各种入射角的定向辐射特性进行建模外，还计算了半球特性以了解光吸收。我们的研究结果可为太阳能电池、红外吸收器和光隔离器的设计提供方法和思路。采用结合单轴介质中各向异性波传播的薄膜光学公式来计算 D-InSb 薄膜的单向吸收率。研究了填充率和层数等几何参数的影响。除了对各种入射角的定向辐射特性进行建模外，还计算了半球特性以了解光吸收。我们的研究结果可为太阳能电池、红外吸收器和光隔离器的设计提供方法和思路。还计算了半球特性以了解光吸收。我们的研究结果可为太阳能电池、红外吸收器和光隔离器的设计提供方法和思路。还计算了半球特性以了解光吸收。我们的研究结果可为太阳能电池、红外吸收器和光隔离器的设计提供方法和思路。