Berlin 2015 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 41: Optical and Nonlinear Optical Properties I (joint session DF, CPP)

CPP 41.2: Talk

Wednesday, March 18, 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.