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Aperiodic biomimetic Vogel spirals as diffractive optical elements for tailored light distribution in functional polymer layers
Journal of Optics ( IF 2.1 ) Pub Date : 2021-04-29 , DOI: 10.1088/2040-8986/abf8cc
M Merkel , T Schemme , C Denz

The biomimetic, deterministic aperiodic golden angle Vogel spiral lacks both translational and rotational symmetry and exhibits circularly symmetric scattering rings in Fourier space. We present a versatile and low cost method for maskless fabrication of a Vogel spiral relief grating by illumination of a photoresist with laser light complexly structured using a spatial light modulator and subsequent transfer of its negative into a polymer layer via replica molding. We investigate its diffractive properties and present as one application its implementation as a surface structure, leading to an efficiency enhancement of 18% in an organic solar cell.



中文翻译:

非周期性仿生 Vogel 螺旋作为衍射光学元件,用于在功能聚合物层中定制光分布

仿生的、确定性的非周期性黄金角 Vogel 螺旋缺乏平移和旋转对称性,并在傅立叶空间中表现出圆形对称的散射环。我们提出了一种通用且低成本的方法,通过使用空间光调制器复杂结构的激光照射光刻胶来无掩模制造 Vogel 螺旋浮雕光栅,然后通过复制成型将其负片转移到聚合物层中。我们研究了它的衍射特性,并将其作为表面结构的一种应用呈现出来,从而使有机太阳能电池的效率提高了 18%。

更新日期:2021-04-29
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