Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 61: Ultrashort Laser Pulses II
Q 61.1: Talk
Thursday, March 26, 2015, 14:30–14:45, K/HS2
Femtosecond laser writing of Type I and Type II waveguides in polymers — •Welm Pätzold1, Carsten Reinhardt2, Bernhard Kreipe1, Boris Chichkov2, and Uwe Morgner1,2 — 1Institut für Quantenoptik, Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover — 2Laserzentrum Hannover e.V., Hollerithallee 8, 30419 Hannover
The method of direct material modification through multi-photon absorption of tightly focused fs-laser radiation is already widely applied on glasses and laser crystals for micromachining purposes. The transfer of this technique to polymers offers the potential to create low cost, flexible foils with integrated photonic structures. Especially when the structural change manifests as a change in refractive indices, the fabrication of embedded 3-dimensional waveguides becomes feasible.
We investigate the formation of Type I (guiding in the modified region) and Type II (guiding in-between modified regions) waveguides in different polymer materials. We explore different writing parameters, the morphology of the resulting waveguides, and their longterm stability.