ポリ(p-フェニレンビニレン)誘導体の共鳴ラマン散乱及びレーザー発振におけるフォトニック結晶としてのオパールマトリックスの周期構造効果と溶媒効果

An intense Raman line is observed upon optical excitation by a second harmonic generation (SHG) light of Nd-YAG laser above some threshold intensity from opals infiltrated with conducting polymer, poly(p-phenylenevinylene) derivatives accompanying with spectral narrowing of photoluminescence (PL) by amplified spontaneous emission (ASE) and evolution of multi-mode lasing (ML) lines. The existence of this Raman line is dependent on the solvent used for infiltration. The threshold excitation intensity of the evolution of the Raman line is higher than those of ASE and ML. However, the enhancement of the Raman intensity above the threshold is much more drastic than those of ASE and ML. The results are interpreted in terms of amplification of the resonant Raman line influenced by an optical feedback effect due to the periodic structure of the opal matrix as a photonic crystal