Laser Applications of Dendrimers Shinro MASHIKO, Shiyosi YOKOYAMA, Tatuo NAKAHAMA and Akira OTOMO Abstract: We have investigated optical properties of dye-encapsulated dendrimers for photonic application and observed severalinteresting behavior，such as controlled intermolecular interactions，super−radiance，and supernarrowing laser emission. A supernarrowing laser spectrum was obserbed without using any resonator mirrors due to moderate scattering caused by densely doped dendrimer aggregates in a polymer wavegaide. Weak scatteringf from the aggregated dendrimers in the host polimer matrix with galn is responsible for photon locarization.