Photonic hyperuniform networks obtained by silicon double inversion of polymer templates

Muller, Nicolas; Haberko, Jakub; Marichy, Catherine; Scheffold, Frank

doi:10.1364/OPTICA.4.000361

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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

20.03.2017

Published in:

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.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language