Regensburg 2019 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 20: Poster session II
MM 20.10: Poster
Dienstag, 2. April 2019, 18:30–20:00, Poster C
Liquid-Infused Nanoporous Solids as Photonic Metamaterials — Kathrin Sentker1, Mark Busch1, Andriy V. Kityk2, and •Patrick Huber1 — 1Institute of Materials Physics, Hamburg University of Technology (Germany) — 2Department of Electrical Engineering, Czestochowa University of Technology (Poland)
Metamaterials derive their functional properties not from the properties of the base materials, but from their newly designed, often multiscale structures, in terms of precise shape, geometry, size, orientation, and elastic properties. Such hybrid material systems can be designed by infusing liquids in porous solids. In particular nanoporous media offer the possibility to establish structures significantly smaller than visible-light wavelengths and thus to act as photonic metamaterials, where the optical properties can be fine-tuned by the filling of the pore space. Here we present Laser-optical, x-ray and neutron diffraction experiments on monolithic nanoporous silicon, silica and alumina filled with simple (n-alkanes, water) and complex liquids (polymers, liquid crystals). These experiments allow us to gain detailed insights on the liquid distribution in the nanoporous media and the phase behaviour of the confined fluids with regard to the unconfined state. By the same token the resulting soft-hard hybrid materials exhibit novel properties typical of photonics metamaterials, encompassing optical birefringence step-wise changing with temperature, switchable optical transmission and fast electro-optical activity.