We present the estimated parameter ( Q factor) derived from scalar diffraction theory for a two-layer single-relief sawtooth diffraction microstructure comprising a pair of optical materials. The Q factor allows the negative effects that arise due to the nonlinearity of the difference in the refractive indices of optical materials to be evaluated. This parameter enables pairs of optical materials to be easily compared and the most promising ones to be selected. Using the mathematical model based on microstructures with the minimum and maximum Q factor values, the best possible angular characteristics in framework of the rigorous theory of diffraction are estimated for a two-layer single-relief microstructure. It is shown that the angular characteristics of a microstructure composed of two nanocomposite materials are very close to the maximum possible characteristics.

中文翻译：

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两层单浮雕的锯齿形衍射微结构的潜在机会

我们提出了由标量衍射理论推导的包括一对光学材料的两层单浮雕锯齿形衍射微结构的估计参数（Q因子）。Q因数允许评估由于光学材料的折射率差异的非线性而产生的负面影响。该参数可以轻松地比较光学材料对，并选择最有希望的材料。使用基于具有最小和最大Q因子值的微结构的数学模型，在严格的衍射理论框架内，估计了两层单浮雕微结构的最佳可能角度特性。