18 May 2010 Optical spectroscopy with organic semiconductor lasers
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We report on the fabrication of large-scale surface gratings by laser interference lithography and reactive ion etching on which we evaporated a thin film of the organic semiconductor tris(8-hydroxyquinoline) aluminum doped with the laser dye 4-dicyanomethylene-2-methyl-6-(p-dimethylaminostyril)-4H-pyrane. We created a thickness gradient by using a rotating shadow mask evaporation technique. This allowed us to continuously tune the emission wavelength from 606 nm to 661 nm on a single substrate. After encapsulation, we demonstrated the usefulness of such low-cost and tunable organic semiconductor lasers by conducting simple fluorescence excitation and transmission spectroscopy measurements using a minimal amount of additional optical components.
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Sönke Klinkhammer, Sönke Klinkhammer, Thomas Woggon, Thomas Woggon, Christoph Vannahme, Christoph Vannahme, Ulf Geyer, Ulf Geyer, Timo Mappes, Timo Mappes, Uli Lemmer, Uli Lemmer, } "Optical spectroscopy with organic semiconductor lasers", Proc. SPIE 7722, Organic Photonics IV, 77221I (18 May 2010); doi: 10.1117/12.854785; https://doi.org/10.1117/12.854785

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