BLUE SUPERRADIANCE FROM NEAT SEMICONDUCTING ALTERNATING COPOLYMER FILMS

Blue superradiant emission in thin polymer films with a low energy thr eshold, as reported here, offers hope for the possible development of solid-state electrically pumped polymer lasers The absorbance, emissio n, and fluorescence spectra of the blue-light emitting copolymer (2,5- di-n-octyl-p-phenylene)-vinytene-p-phenylene] are presented and discus sed. It is suggested that lasing in the superradiant regime occurs as a result of the combination of optically induced net gain and waveguid ing in the thin film.