Abstract
An optically pumped circular grating polymer laser (see Figure) is obtained using a nanostructured quartz substrate covered with a thin film of methyl-substituted ladder-type poly(p-phenylene) (MeLPPP). The second-order grating serves at the same time as a 2D feedback mechanism and as an output coupler. Laser emission perpendicular to the substrate with a clear threshold behavior, an extremely narrow spectral width, and a highly directional beam is achieved.
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