Berlin 2018 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 54: Organic semiconductors
HL 54.7: Vortrag
Freitag, 16. März 2018, 11:15–11:30, EW 203
Three-dimensional photonic confinement in imprinted liquid crystalline pillar microcavities — •Marco Dusel1, Simon Betzold1, Sebastian Brodbeck1, Stefanie Herbst2, Frank Würthner2, Daniel Friedrich3, Bert Hecht3, Christof P. Dietrich1, and Sven Höfling1, 4 — 1Technische Physik, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Institut für Organische Chemie and Center for Nanosystems Chemistry, Universität Würzburg — 3Nano-Optics and Biophotonics Group, Universität Würzburg — 4SUPA, School of Physics and Astronomy, University of St Andrews, St Andrews, UK
Organic semiconductors are used as an active material in laser cavities for more than 50 years where they have shown great versatility and flexibility and furthermore enable measurements to be conducted at room temperature. The most common organic cavity design is given by sandwiching an organic material between two highly reflective mirrors. However, those planar microcavities suffer from photonic losses within the layer plane.
Alternatively, we demonstrate three-dimensional photonic confinement in a planar organic microcavity by using thermal imprint technology to structure pillars in an organic liquid crystal (LC) on top of a mirror. After structuring, we evaporate Au on top to form the cavity. The so-fabricated pillar microcavities achieve three-dimensional photonic confinement. Our developed process brings the investigation of optical phenomena in much more complicated photonic potentials such as coupled pillars, chains or lattices, into reach.