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arXiv · 1706.06633

Surface quasi periodic and random structures based on nanomotor lithography for light trapping

Sh. Golghasemi Sorkhabi·S. Ahmadi-Kandjani·F. Cousseau·M. Loumaigne·S. Zielinska·E. Ortyl·R. Barille
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Abstract

We compare the characteristics of two types of patterns obtained with two azopolymer materials: a Gaussian random pattern and a quasi-random grating pattern. The surface structurations have been obtained with a simple bottom-up technique by illuminating azopolymer thin films with a single laser beam. We demonstrate the interesting generated properties of these two surfaces. In particular, the surface with quasi-random gratings can address beam splittings for light coupling in different directions in an ultra-thin film. We use these two surfaces as a mold and replicate them on a transparent elastomeric material and we demonstrate a very good light entrapment. We also show that the efficiency of light trapping is 20% better with the quasi-random gratings than with the Gaussian random surface, and is close to 40%.

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Sh. Golghasemi Sorkhabi, S. Ahmadi-Kandjani, F. Cousseau, M. Loumaigne, S. Zielinska, E. Ortyl, R. Barille. 2017-06-20. Surface quasi periodic and random structures based on nanomotor lithography for light trapping. https://doi.org/10.1063/1.4991480

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