CAJ | 학술논문

以一种新型蓝光发射聚合物多聚(5-二苯胺基)-1,3-苯乙烯(Yu1)及其单体材料5-二苯胺基苯基.1,3-二甲醛(Yu0)为研究对象,利用飞秒Z扫描技术和泵浦-探测技术研究了这两种材料的非线性光学性质以及超快动力学.结果表明,聚合后,聚合物Yu1的双光子吸收性质得到显著增强,每重复单元的双光子吸收截面达到单体Yu0的10倍.超快动力学研究结果揭示了Yu0和YU1的不同弛豫过程.聚合物Yu1的400 nm单色泵浦-探测实验结果表现出明显的各向异性:由于激子迁移的高度方向性,泵浦光与探测光偏振方向平行配置时观察到的快过程在偏振方向垂直配置时消失.非线性光学性质以及超快动力学研究结果表明聚合单体对非线性性质的增强效应.
이일충신형람광발사취합물다취(5-이분알기)-1,3-분을희(Yu1)급기단체재료5-이분알기분기.1,3-이갑철(Yu0)위연구대상,이용비초Z소묘기술화빙포-탐측기술연구료저량충재료적비선성광학성질이급초쾌동역학.결과표명,취합후,취합물Yu1적쌍광자흡수성질득도현저증강,매중복단원적쌍광자흡수절면체도단체Yu0적10배.초쾌동역학연구결과게시료Yu0화YU1적불동이예과정.취합물Yu1적400 nm단색빙포-탐측실험결과표현출명현적각향이성:유우격자천이적고도방향성,빙포광여탐측광편진방향평행배치시관찰도적쾌과정재편진방향수직배치시소실.비선성광학성질이급초쾌동역학연구결과표명취합단체대비선성성질적증강효응.
The nonlinear optical properties and the excited state dynamics of a new blue-light emitting polymer poly[5-(diphenylamino)-l,3-phenylenevinylene] (Yu1) and its starting material 5-(N,N-diphenylamino)benzene-1,3-dicarbaldehyde (Yu0) were studied. In contrast to the monomer Yu0, the two-photon absorption (TPA) properties of Yu1 were found to be significantly enhanced upon polymerization. The TPA cross section of Yu1 (per repeating unit) increased about tenfold compared to Yu0. Femtosecond pump-probe experiments were carried out to study the excited state dynamics of the two materials. An investigation of the ultrafast dynamics demonstrated that different relaxation processes occurred in the Yu0 and Yu1 samples. Apparent optical anisotropy was observed from a one-color pump-probe experiment of the polymer Yu1 at 400 nm. The fast component observed in the parallel configuration of Yu1 disappeared when the perpendicular polarization configuration was used because of the high orientation of exciton migration. The nonlinear optical study and the ultrafast dynamics results indicated that the nonlinear optical properties were enhanced because of monomer polymerization.