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首页> 外文期刊>Optics Letters >Design of ultrabroadband internal reflection gratings with high efficiency
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Design of ultrabroadband internal reflection gratings with high efficiency

机译：高效超宽带内反射光栅的设计

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摘要

A high-efficiency, ultrabroadband dielectric internal reflection grating with rhombus-shaped grooves is designed by a rigorous coupled-wave analysis, and an effective method for predicting spectral bandwidths of gratings from their efficiency maps is presented. The grating can be fabricated from a single dielectric material, and its reflection diffraction efficiency of the -1st order can reach more than 0.99. More importantly, an ultrabroadband top-hat diffraction spectrum with efficiency exceeding 0.98 over 170nm wavelength wide is achieved, which makes the gratings suitable for applications associated with broadband illumination, such as ultrashort pulses.
机译：通过严格的耦合波分析，设计了一种具有菱形槽的高效超宽带介质内反射光栅，并提出了一种有效的从光栅效率谱图预测光谱带宽的方法。光栅可以由单一介电材料制成，其-1阶反射衍射效率可以达到0.99以上。更重要的是，获得了在170nm波长范围内效率超过0.98的超宽带礼帽衍射光谱，这使得光栅适合与宽带照明相关的应用，例如超短脉冲。

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