Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 39: Poster: Quantum Optics and Photonics II
Q 39.21: Poster
Dienstag, 6. März 2018, 16:15–18:15, Zelt Ost
Polymer waveguide fabrication with high aspect ratio by direct laser writing — •Julian Schulz1, Christina Jörg1, and Georg von Freymann1,2 — 1Physics Department and Research Center OPTIMAS, University of Kaiserslautern, Germany — 2Fraunhofer Institute for Industrial Mathematics ITWM, Kaiserslautern, Germany
Due to the robustness of topologically protected states, topology is of great interest in physics since the discovery of the quantum hall effect. To simulate, e.g., topological effects one can use structures of evanescently coupled waveguides. This is due to the fact, that the time evolution of a quantum mechanical wave function in a 2D-solid corresponds to the light intensity along the propagation direction of these waveguides.
To produce these structures, we use direct laser writing (DLW) which allows to fabricate three-dimensional objects made of polymer with a resolution of less than 1 μm. First, the inverse of these waveguide arrays is written by DLW and then infiltrated with SU8. This way, waveguides with axes curved along 3D trajectories are fabricated [1].
Up to now, these waveguide axes are always oriented normal to the substrate, i.e. along the z-direction. Therefore the lower z-resolution, due to the elongation of the writing voxel in z, is no problem. However, the maximal height of these structures is thus limited by instability. To overcome this limitation, we develop a technique to fabricate waveguides with axis parallel to the substrate. This would result in a much longer evolution of light and thus more observable physics.
[1] Jörg, et al., New J. Phys. 19, 083003 (2017).