We have recently designed a new type of a flat metal-dielectric grating which is supposed to replace blazed diffraction gratings, providing very high −1st reflected diffraction order efficiency within a broad wavelength band, high durability, and relative ease of fabrication. In this communication we present a rigorous electromagnetic theory of the grating in the approximation of infinitely thin perfect metal and show that the properly designed grating can reach 100% diffraction efficiency in the Littrow configuration for either transversal electric (TE or s) or transversal magnetic (TM or p) polarizations. Properties of the grating are analysed and discussed in detail.

中文翻译：

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平面金属介电光栅具有100％的逆衍射效率：严格的理论

我们最近设计了一种新型的扁平金属电介质光栅，该光栅应替代闪耀的衍射光栅，在宽波段内提供非常高的-1st反射衍射级效率，高耐用性和相对易于制造的特性。在本交流中，我们提出了一种严格的电磁理论，以近似于无限薄的完美金属，并证明了对于横向电（TE或s）或横向磁（ TM或p）极化。光栅的特性被详细分析和讨论。