Journal article

Photonic hyperuniform networks obtained by silicon double inversion of polymer templates

  • Muller, Nicolas Department of Physics, University of Fribourg, Switzerland
  • Haberko, Jakub Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Krakow, Poland
  • Marichy, Catherine Department of Physics, University of Fribourg, Switzerland - Université de Lyon, Laboratoire des Multimatériaux et Interfaces, Villeurbanne, Lyon, France
  • Scheffold, Frank Department of Physics, University of Fribourg, Switzerland
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  • Optica. - 2017, vol. 4, no. 3, p. 361–366
English Hyperuniform disordered networks belong to a peculiar class of structured materials predicted to display isotropic complete photonic bandgaps for a refractive index contrast larger than 3. The practical realization of such photonic designer materials is challenging, however, as it requires control over a multi-step fabrication process on optical length scales. Here we report the direct-laser writing of three-dimensional hyperuniform polymeric templates followed by a silicon double inversion procedure leading to high-quality network structures made of polycrystalline silicon. We observe a pronounced gap in the shortwave infrared centered at a wavelength of 𝜆Gap≃2.5  μm, in good agreement with numerical simulations. In the experiments the typical structural length scale can be varied between 2 and 1.54 μm, leading to a blueshift of the gap accompanied by an increase of the silicon filling fraction.
Faculté des sciences et de médecine
Département de Physique
  • English
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