Regensburg 2013 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 19: Poster 2
DF 19.13: Poster
Mittwoch, 13. März 2013, 15:00–17:30, Poster B2
Microgoblet Lasers for Label-free Biosensing — •Jan Fischer1, Sarah Wiegele1, Tobias Grossmann1, Torsten Beck1, Martin Mai1, Uwe Bog2, Timo Mappes2, and Heinz Kalt1 — 1Institut für Angewandte Physik, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany — 2Institut für Mikrostrukturtechnik, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
Biosensors for label-free detection offer a huge variety of applications in life science. We report on laser dyes embedded in goblet-shaped polymeric microresonators. These resonators are fabricated in a simple and low-cost manufacturing process suitable for mass production. The dye-doped polymer poly(methyl methacrylate) (PMMA) is directly processed on a silicon substrate. The developing and etching process is followed by a thermal reflow step which smoothes the surface and enhances the Q-factor significantly. The emission of these microgoblet lasers is in the visible region and can be varied using different laser dyes. The surface of the resonators can be functionalized with different receptors sensitive to wanted molecules. Binding of molecules can be detected by measuring the spectral shift of the resonant whispering gallery mode.