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Antireflective "moth-eye" structures on tunable optical silicone membranes.

Robert Brunner1, Bettina Keil, Christoph Morhard

  • 1University of Applied Sciences Jena, Carl-Zeiss-Promenade 2, 07745 Jena, Germany. Robert.brunner@fh‐jena.de

Applied Optics
|July 10, 2012
PubMed
Summary

Flexible silicone membranes now feature "moth-eye" structures for enhanced antireflective (AR) properties. These nanostructured membranes improve light transmittance by over 2.5% even under strain.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Nanotechnology

Background:

  • Flexible silicone membranes are crucial for tunable optical lenses.
  • Traditional antireflective (AR) coatings are incompatible with elastic membrane operation.
  • Developing AR solutions for flexible optics is essential for advanced optical systems.

Purpose of the Study:

  • To integrate moth-eye nanostructures directly into flexible silicone membranes.
  • To evaluate the antireflective performance of these nanostructured membranes under mechanical strain.
  • To enhance light transmittance in tunable optical lenses utilizing flexible membranes.

Main Methods:

  • Utilized block copolymer micelle nanolithography for mastering AR structures.
  • Employed a replication method to transfer moth-eye structures onto silicone membranes.

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  • Investigated AR structure performance under up to 20% membrane expansion.

    • Main Results:

    • Achieved significant transmittance enhancement up to 2.5% across the visible spectrum.
    • Demonstrated that moth-eye structures compensate for over 50% of surface reflection losses.
    • Confirmed the functionality of AR structures on flexible silicone substrates under strain.

    Conclusions:

    • Directly integrating moth-eye structures into silicone membranes offers an effective AR solution for flexible optics.
    • The developed nanostructuring technique is compatible with the elastic nature of optical membranes.
    • This advancement enables improved performance for tunable optical lenses and other flexible optical devices.