Blue green stimulated emission from a high gain conjugated polymer

Abstract
An optically pumped waveguidestructure has been fabricated with methyl substituted conjugated laddertype poly(paraphenylene) as the active material. The choice of the device parameters allows one to observe a high directionality, a small beam divergence, a complete linear polarization, and a linewidth with an upper limit of 1.7 nm at a considerable low threshold of 3 kW/cm 2 at room temperature.