Muller, Nicolas Haberko, Jakub Marichy, Catherine Scheffold, Frank 2017-03-20 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. application/pdf https://folia.unifr.ch/global/documents/305599 https://folia.unifr.ch/documents/305599/files/sch_phn.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1364/OPTICA.4.000361 info:eu-repo/semantics/openAccess License undefined Optica. - 2017, vol. 4, no. 3, p. 361–366 info:eu-repo/classification/udc/53 Photonic hyperuniform networks obtained by silicon double inversion of polymer templates http://purl.org/coar/resource_type/c_6501