Blue superradiance from neat semiconducting alternating copolymer films

Blue superradiant emission in thin polymer films with a low energy threshold, as reported here, offers hope for the possible development of solid‐state electrically pumped polymer lasers. The absorbance, emission, and fluorescence spectra of the blue‐light emitting copolymer poly[dimethylsilylene‐ p ‐phenylene‐vinylene‐(2,5‐di‐ n ‐octyl‐ p ‐phenylene)‐vinylene‐ p ‐phenylene] are presented and discussed. It is suggested that lasing in the superradiant regime occurs as a result of the combination of optically induced net gain and waveguiding in the thin film.