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发展新型的光子开关在光计算和光通讯领域里具有重要的意义.团簇——作为空间尺度,是零点几到几十纳米的原子或分子的微观和亚微观聚集体显示出与通常固体材料不同的电子和光学性质.目前,无机纳米材料大的三阶非线性光学效应已引起了国内外的重视,深入的研究可望将团簇开发成一类具有特殊性能的非线性光学材料.本文报道一种嵌埋于有机玻璃(PMMA)中的聚苯胺(PAn)团簇的飞秒非线性光学特性.采用飞秒瞬态吸收激光光谱技术分别测量了近共振和非共振条件下的PAn团簇的光激发和弛豫过程,测量结果显示出PAn团簇的量子尺寸效应导致了其具有比纯聚苯胺固体薄膜更快的光学响应过程.
The development of new types of photonic switches is of great importance in the field of optical computing and optical communication.Clusters- As microscopic and submicroscopic aggregates of atoms or molecules from a few tenths to tens of nanometers, as a spatial scale, show differences from the usual solid materials At present, the large third-order nonlinear optical effect of inorganic nanomaterials has drawn great attention at home and abroad, and in-depth study is expected to develop clusters into a class of nonlinear optical materials with special properties.In this paper, Species non-linear optical properties of polyaniline (PAn) clusters embedded in plexiglass (PMMA). The femtosecond nonlinear optical properties of polyaniline (PAn) clusters embedded in plexiglass were measured by using femtosecond transient absorption laser spectroscopy The results of photoexcitation and relaxation show that the quantum size effect of PAn clusters leads to faster optical response than pure polyaniline solid films.