Abstract: The present invention relates to a polymeric nanocomposition of matter comprising a plurality of organic quantum dots. The composition includes at least one functionalized polymer chain template and a plurality of size-tunable organic quantum dots self-assembled onto the functionalized polymer chain template. The self-assembled organic quantum dots may be nanometer-scale molecular aggregates with size tunable by the functionalized polymer chain template. The polymer nanocomposite may be coated onto the surface of Ag or Au nanoparticles to achieve surface enhanced properties, such as, surface enhanced Raman effect. One embodiment of the polymer nanocomposites has shown unusual physicochemical property, which is especially suitable for use in optical devices including optical fibers, waveguides, Raman amplifiers, splitters, multiplexers, demultiplexers, attenuators, modulators, switches, and combination of such structures.