Regensburg 2019 – scientific programme

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O: Fachverband Oberflächenphysik

O 68: Poster Wednesday: Nanostructures

O 68.11: Poster

Wednesday, April 3, 2019, 17:45–20:00, Poster B2

Dielectric Waveguide Fabrication by Direct Laser Writing — •Frank Brückerhoff-Plückelmann, Alexander Fassbender, and Stefan Linden — Physikalisches Institut, Rheinische Friedrich- Wilhelms Universität Bonn, Nußallee 12, D-53115 Bonn, Germany

Direct laser writing allows the fabrication of three dimensional polymer structures from a negative tone photoresist by two photon absorption with an accuracy of a few hundred nanometer. By choosing the refractive index of the polymer slightly larger than the one of the glass substrate, we can use an external laser to excite guide modes in the printed structure [cf. Landowski, Freymann et al. '17]. For an efficient coupling we exploit the high refractive index difference between the polymer and air e.g. by designing a prism shaped coupler that uses total internal reflection at the polymer air interface. We study different coupler geometries and the overall performance of the polymer waveguides. In order to design larger optical networks we also test a simple beam splitting device.