咔唑类化合物的光谱特性与三光子激射  

Spectral Properties of Carbazole Molecules and Three-Photon Induced Lasing

作　　者：韦中超[1] 范海华[1] 李娜[1] 汪河洲[1] 钟增培[2] 

机构地区：[1]中山大学光电材料与技术国家重点实验室,广东广州510275 [2]中山大学化学与化学工程学院,广东广州510275

出　　处：《光谱学与光谱分析》2006年第6期999-1002,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金(10274108);"973"基金(2004CB719804);广东省自然科学基金资助项目

摘　　要：测量了一系列新合成的咔唑类化合物的光谱特性。光谱研究结果发现端基团的选择引起双光子吸收截面的巨大变化。用1.3μm强fs激光激发其中一双光子吸收截面高达617.3 GM的分子溶液,其波长和时间分辨光谱特性表明此分子的高方向性光发射是三光子诱导激射。[1 GM(G ppert-Mayer)=10-50cm4.s.(photon)-1]。Spectral properties of a series of new heterocyelic molecules were studied in the present work. The spectral experirnental results show that the two-photon absorption cross-sections of these new molecules are dependent on their charge transfer dipole moments, which relate to the donor aeeeptor end groups. At high density pumping, the spectral and temporal properties of the high directional emission of a new molecule with two-photon absorption cross-section of 617.3 GM demonstrate that three-photon induced lasing occurs.

关 键 词：光谱 结构-性能关系 三光子激射 杂环化合物 

分 类 号：O433.4[机械工程—光学工程]