Effective grating theory for resonance domain surface-relief diffraction gratings.
Effective grating theory for resonance domain surface-relief diffraction gratings.
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共振域表面浮雕衍射光栅的有效光栅理论。
DOI：
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发表时间：
2005
影响因子：
1.9
通讯作者：
A. Friesem
中科院分区：
文献类型：
--
作者：
M. Golub;A. Friesem
提出了一种有效光栅模型，将有效介质理论推广到谐振域表面浮雕光栅的情况。除了零级之外，它还考虑了第一衍射级，它服从布拉格条件。将表面浮雕光栅建模为具有两个衍射级的有效光栅，提供了效率和光栅参数之间的封闭形式的解析关系。预测了TE和TM偏振的高宽比、光栅周期和所需的入射角，并通过严格的数值计算进行了验证。
An effective grating model, which generalizes effective-medium theory to the case of resonance domain surface-relief gratings, is presented. In addition to the zero order, it takes into account the first diffraction order, which obeys the Bragg condition. Modeling the surface-relief grating as an effective grating with two diffraction orders provides closed-form analytical relationships between efficiency and grating parameters. The aspect ratio, the grating period, and the required incidence angle that would lead to high diffraction efficiencies are predicted for TE and TM polarization and verified by rigorous numerical calculations.