A Low Threshold Polymer Laser Based on Metallic Nanoparticle Gratings


  • We are indebted to the DFG for financial support through the Schwerpunkt Photonische Kristalle and the Gottfried-Wilhelm-Leibniz Award, to the BMBF through the OLAS collaboration, and the European Union through the TMR Network HYTEC. We gratefully acknowledge expert technical support from W. Stadler, A. Helfrich, A. Kriele, and K. Werhahn.


Optically pumped lasing is demonstrated in a device consisting of a conjugated polymer on top of a 2D distributed feedback template comprising gold nanodiscs on indium tin oxide (see Figure). Although the nanodiscs are potential dissipative energy absorbers only a marginal increase in lasing threshold is found when compared to conventional dielectric distributed feedback resonators. The inset shows a photograph of the far-field emission above threshold.