Holographic Fabrication and Optical Property of Graded Photonic Super-Crystals with a Rectangular Unit Super-Cell
Holographic Fabrication and Optical Property of Graded Photonic Super-Crystals with a Rectangular Unit Super-Cell
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DOI：
10.3390/photonics5040034
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发表时间：
2018-12-01
期刊：
影响因子：
2.4
通讯作者：
Lin, Yuankun
中科院分区：
文献类型：
--
作者：
Hassan, Safaa;Sale, Oliver;Lin, Yuankun
最近开发的分级光子超晶体如果分别与太阳能电池和有机发光器件集成，则显示出增强的光吸收和光提取效率。在本文中，我们提出了具有矩形单元超级单元的分级光子超晶体的全息制造。基于空间光调制器的入射激光束的逐像素相位工程为干涉光刻提供了高分辨率相位图案。这也为具有不同长宽比的矩形单元超级电池的分级光子超晶体提供了灵活的设计。模拟了有机发光器件的光提取效率，其中阴极采用分级光子超晶体进行图案化。在干涉光刻过程中，对于不同的曝光阈值，保持高提取效率。对于某些曝光阈值，可以观察到所需的偏振效应。在玻璃基板上萃取效率高达75%。
Recently developed graded photonic super-crystals show an enhanced light absorption and light extraction efficiency if they are integrated with a solar cell and an organic light emitting device, respectively. In this paper, we present the holographic fabrication of a graded photonic super-crystal with a rectangular unit super-cell. The spatial light modulator-based pixel-by-pixel phase engineering of the incident laser beam provides a high resolution phase pattern for interference lithography. This also provides a flexible design for the graded photonic super-crystals with a different ratio of length over the width of the rectangular unit super-cell. The light extraction efficiency is simulated for the organic light emitting device, where the cathode is patterned with the graded photonic super-crystal. The high extraction efficiency is maintained for different exposure thresholds during the interference lithography. The desired polarization effects are observed for certain exposure thresholds. The extraction efficiency reaches as high as 75% in the glass substrate.