Abstract

We report a study of a new class of organic semiconductor as an optical gain medium. We demonstrate amplification of violet light by use of stimulated emission in a solution of a first-generation bis-fluorene-cored semiconducting dendrimer. Amplification is also observed in the solid state by means of amplified spontaneous emission in an optically pumped dendrimer planar waveguide. Gains of $36 {\mathrm{dB\; cm}}^{-1}$ at 420 nm and $26 {\mathrm{dB\; cm}}^{-1}$ at 390 nm in solution and $350 {\mathrm{dB\; cm}}^{-1}$ in the solid state are obtained. These results show that semiconducting dendrimers have potential as visible laser and amplifier materials.

© 2004 Optical Society of America

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