München 2019 – scientific programme
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K: Fachverband Kurzzeit- und angewandte Laserphysik
K 6: Laser Applications I
K 6.4: Talk
Wednesday, March 20, 2019, 12:00–12:20, HS 3
High Index Materials for Femtosecond 3D Printing of Complex Micro-Optics — •Ksenia Weber1, Peter König2, Simon Thiele3, Alois Herkommer3, Peter William de Oliveira2, and Harald Gießen1 — 14th Physics Institute and Research Center SCoPE, University of Stuttgart, Stuttgart — 2INM-Leibniz Institut für Neue Materialien, Saarbrücken, Germany — 3Institute for Applied Optics and Research Center SCoPE, University of Stuttgart, Stuttgart
Femtosecond 3D printing is a powerful, state-of-the-art technology that allows for the fabrication of high quality micro- and nano-optical devices with sub-micrometer resolution. Since it is an additive process, it enables the fabrication of complex shapes which are difficult or impossible to create with traditional manufacturing methods. However, photopolymer materials used in femtosecond 3D printing typically exhibit very similar optical properties, with refractive indices mostly limited to values around 1.5. This severely reduces the design freedom in micro-optics compared to macroscopic optics where a vast range of different optical materials is available. Here we present a variety of novel 3D printable materials with refractive indices up to 1.66 and varying Abbe numbers. We demonstrate that these materials are suitable for the fabrication of high performance complex micro-optical components like high NA diffractive optical elements or multi-material devices like achromatic doublet lenses.