Grating structure

The utility model provides a grating structure. The grating structure includes: a substrate structure; the grating layer is a single layer, the grating layer is of a periodic structure, each grating period serves as a sub-grating, each sub-grating is provided with two grating ridges with different d...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: WANG JIE, SUN LIBIN, YIN ZHENGKUN, CHEN YUAN
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The utility model provides a grating structure. The grating structure includes: a substrate structure; the grating layer is a single layer, the grating layer is of a periodic structure, each grating period serves as a sub-grating, each sub-grating is provided with two grating ridges with different duty ratios, and the grating ridges are of a rectangular structure. The polarization beam splitter solves the problem that in the prior art, the dispersion capability of +/-1-level diffraction light in different polarization states is different. 本实用新型提供了一种光栅结构。光栅结构包括:基底结构;光栅层,光栅层为单层,光栅层为周期结构,每个光栅周期作为一个子光栅,子光栅具有两个占空比不同的光栅脊,光栅脊为矩形结构。本实用新型解决了现有技术中偏振分束器件存在不同偏振状态的±1级衍射光的色散能力不同的问题。