论文标题
使用离散空间脉冲响应技术对元整日进行建模
Modeling metasurfaces using discrete-space impulse response technique
论文作者
论文摘要
metasurfaces是次波长元原子的阵列，它们以紧凑和平面形式形成波。元时间的分析和设计需要对其与波的相互作用进行建模的方法。传统的建模技术假设跨空间是通过平面波激发的局部周期结构，将其适用性限制为逐渐改变了用平面波照亮的跨境。在这里，我们介绍了离散的空间脉冲响应概念，该概念可以开发元时间的准确和一般模型。根据所提出的模型，将离散脉冲响应分配给了元截面单元细胞，并用于确定对任何任意入射波的跨表面响应。我们通过将模型的结果与全波模拟进行比较来验证该模型的准确性。所提出的概念和建模技术适用于具有任意元原子的线性元信息，并且可以使用所得的系统级模型将跨索面积准确地融合到使用波或光学器件的模拟和设计工具中。
Metasurfaces are arrays of subwavelength meta-atoms that shape waves in a compact and planar form factor. Analysis and design of metasurfaces require methods for modeling their interactions with waves. Conventional modeling techniques assume that metasurfaces are locally periodic structures excited by plane waves, restricting their applicability to gradually varying metasurfaces that are illuminated with plane waves. Here we introduce the discrete-space impulse response concept that enables the development of accurate and general models for metasurfaces. According to the proposed model, discrete impulse responses are assigned to metasurface unit cells and are used to determine the metasurface response to any arbitrary incident waves. We verify the accuracy of the model by comparing its results with full-wave simulations. The proposed concept and modeling technique are applicable to linear metasurfaces with arbitrary meta-atoms, and the resulting system-level models can be used to accurately incorporate metasurfaces into simulation and design tools that use wave or ray optics.
