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The role of random nanostructures for the omnidirectional anti-reflection properties of the glasswing butterfly

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  • Radwanul Hasan Siddique

    (Institute for Microstructure Technology, Karlsruhe Institute of Technology (KIT))

  • Guillaume Gomard

    (Light Technology Institute (LTI), Karlsruhe Institute of Technology (KIT))

  • Hendrik Hölscher

    (Institute for Microstructure Technology, Karlsruhe Institute of Technology (KIT))

Abstract

The glasswing butterfly (Greta oto) has, as its name suggests, transparent wings with remarkable low haze and reflectance over the whole visible spectral range even for large view angles of 80°. This omnidirectional anti-reflection behaviour is caused by small nanopillars covering the transparent regions of its wings. In difference to other anti-reflection coatings found in nature, these pillars are irregularly arranged and feature a random height and width distribution. Here we simulate the optical properties with the effective medium theory and transfer matrix method and show that the random height distribution of pillars significantly reduces the reflection not only for normal incidence but also for high view angles.

Suggested Citation

  • Radwanul Hasan Siddique & Guillaume Gomard & Hendrik Hölscher, 2015. "The role of random nanostructures for the omnidirectional anti-reflection properties of the glasswing butterfly," Nature Communications, Nature, vol. 6(1), pages 1-8, November.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7909
    DOI: 10.1038/ncomms7909
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    Cited by:

    1. Shanks, Katie & Senthilarasu, S. & Mallick, Tapas K., 2016. "Optics for concentrating photovoltaics: Trends, limits and opportunities for materials and design," Renewable and Sustainable Energy Reviews, Elsevier, vol. 60(C), pages 394-407.
    2. Natarajan Shanmugam & Rishi Pugazhendhi & Rajvikram Madurai Elavarasan & Pitchandi Kasiviswanathan & Narottam Das, 2020. "Anti-Reflective Coating Materials: A Holistic Review from PV Perspective," Energies, MDPI, vol. 13(10), pages 1-93, May.

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