Berlin 2005 – wissenschaftliches Programm
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SYOO: Organic Optoelectronics and Photonics
SYOO 6: Poster
SYOO 6.44: Poster
Montag, 7. März 2005, 18:00–20:00, Poster TU A
Spatial emission characteristics of waveguiding organic nanofibers — •Ralf Frese1, Christian Maibohm1, Jens Gravesen2, Morten Willatzen3, and Horst-Günter Rubahn1 — 1Fysisk Institut, Syddansk Universitet, Campusvej 55, DK-5230 Odense M, Denmark — 2Dept. of Mathematics, Danmarks Tekniske Universitet, DK-2800 Lyngby, Denmark — 3Mads Clausen Institut, University of Southern Denmark, Grundtvigs Allé 150, DK-6400 Sønderborg, Denmark
Organic molecules such as para-hexaphenylene form well-ordered nanostructures upon vacuum deposition on dielectric substrates such as mica. Since their widths can be of the order of several hundred nanometers with heights of a few ten nanometers and lengths of several ten to several hundred micrometers they act as waveguides (nanofibers) for visible light. This waveguiding affects the spatial emission characteristics of intense blue light that is emitted from the nanofibers upon UV light stimulation and leads to enhanced emission along the surface plane. We discuss the experimental findings and explain them with the help of a classical electrodynamics simulation of light propagation in ordered and disordered arrays of nanofibers.