Three-dimensional microlasers based on polymer fibers fabricated by electrospinning

We report three-dimensional mirror-less lasing from non-cylindrical dye doped polystyrene fibers drawn using an electrospinning procedure where the fiber cross-sectional shape and dimension could be controlled. Signatures of three dimensional etalon like modes were observed corresponding to the transverse and axial quantization of the wave vector. Low lasing thresholds of the order of 200 nJ were achieved along with moderate Q factors. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3672223]