학술논문
Aperiodic biomimetic Vogel spirals as diffractive optical elements for tailored light distribution in functional polymer layers.
Document Type
Article
Author
Source
Subject
*DIFFRACTIVE optical elements
*LIGHT elements
*SPATIAL light modulators
*ROTATIONAL symmetry
*POLYMERS
*SOLAR cells
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Language
ISSN
2040-8978
Abstract
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. [ABSTRACT FROM AUTHOR]