Berlin 2015 – wissenschaftliches Programm
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DF: Fachverband Dielektrische Festkörper
DF 12: Optical and Nonlinear Optical Properties I (DF with CPP)
DF 12.2: Vortrag
Mittwoch, 18. März 2015, 10:00–10:20, EB 407
Random-Cavity Lasing from Electrospun Polymer Fiber Networks — •Sarah Krämmer1, Christoph Vannahme2, Cameron L. C. Smith2, Tobias Grossmann1, Michael Jenne1, Stefan Schierle1, Minh Tran1, Lars Jørgensen3, Ioannis S. Chronakis3, Anders Kristensen2, and Heinz Kalt1 — 1Institute of Applied Physics, Karlsruhe Institute of Technology (KIT), Germany — 2Department of Micro- and Nanotechnology, Technical University of Denmark (DTU), Denmark — 3DTU-Food, DTU, Denmark
Electrospinning is a versatile, simple, low-cost and high-throughput technique for the fabrication of fibers and fiber networks with fiber diameters in the micro- and nanometer range. The resulting high surface-to-volume ratio makes the fibers excellent candidates for sensing, tissue-growth and filtering. In the field of photonics they serve as waveguides and light sources when doped with an emitter. We report on the lasing emission from random cavities formed in networks of electrospun dye-doped polymer fibers. Spatially resolved spectroscopy and spectral analysis prove that the observed laser emission originates from individual ring resonators randomly distributed throughout the network. Preliminary measurements show the suitablity of the fiber networks as gas sensors where the spectral position of a lasing mode serves as transducer.