Stimulated resonance Raman scattering from polyphenylenevinylene thin film waveguides

Stimulated resonance Raman scattering (SRRS) from a polymer waveguide has been studied using spin-coated thin films of poly(5-(2-ethylhexyloxy)-2-methoxy-cyanoterephthalydiene). The single SRRS peak with a Raman shift of similar to 1580 cm(-1) was observed above the excitation threshold of similar to 100 mu J/cm(2), overlapping with the amplified spontaneous emission (ASE) band. When the excitation wavelength was varied, the SRRS intensity was maximized at the ASE peak position. It suggests that the light confinement in the polymer waveguide resulting in the stimulated amplification of Raman scattering plays a significant role in the observed SRRS phenomenon. In addition, the thickness dependence of the SRRS gain coefficients suggests some contribution of cooperative interaction to SRRS. (c) 2006 American Institute of Physics.