The equivalent circuit approach (ECA) is used in this work to analyze and design a previously proposed one-dimensional planar blazed grating of the resonant type. The analysis covers both the classical Littrow configuration, when the direction of the relevant diffracted order coincides with that of the incident wave (Bragg blazing), and when these directions are different (off-Bragg blazing). Once the scattering problem of the grating structure is posed as a discontinuity problem inside an equivalent generalized waveguide (corresponding to the unit cell of the original structure) and studied in terms of its equivalent circuit network, the possibility of transferring all the power of the incident plane wave into one single-diffraction order is seen as a simple impedance matching problem. An associated resonance phenomenon is also found to be implicitly associated with this matching condition. This simplifying and fruitful standpoint makes it possible to set up a systematic design procedure to find the specifications of the planar grating for either Bragg or non-Bragg blazing operation. Dielectric and strong skin-effect ohmic losses are easily implemented in the ECA and its effects in the practical design of structures are discussed.

中文翻译：

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从电路模型的角度看平面谐振闪耀光栅

在这项工作中使用等效电路方法 (ECA) 来分析和设计先前提出的谐振型一维平面闪耀光栅。该分析涵盖了经典的 Littrow 配置，当相关衍射级的方向与入射波的方向重合时（布拉格闪耀），以及当这些方向不同时（非布拉格闪耀）。一旦将光栅结构的散射问题作为等效广义波导（对应于原始结构的晶胞）内部的不连续性问题提出，并根据其等效电路网络进行研究，则有可能将入射的所有功率传输将平面波转换为一个单衍射级被视为一个简单的阻抗匹配问题。还发现相关的共振现象与该匹配条件隐含地相关。这种简化和富有成效的观点使得建立系统的设计程序成为可能，以找到用于布拉格或非布拉格燃烧操作的平面光栅的规格。介电损耗和强趋肤效应欧姆损耗很容易在 ECA 中实现，并讨论了其在实际结构设计中的影响。