飞秒激光作用下异质结的线性吸收谱研究

以二奈嵌苯分子吸附在TiO₂表面所组成的异质结构为例，介绍了在飞秒激光作用下由染料分子和半导体组成的异质结构中从分子基态到半导体导带的超快电子传输过程，在理论上分析了分子内部传输和直接电子传输过程对线性吸收谱的贡献.与分子内部传输过程项相比较分析了电子的超快直接传输在不同的分子及半导体结构下对线性吸收谱的影响.关键词：飞秒激光线性吸收谱超快电子转移

Computational study of heterogeneous absorption spectra under femtosecond laser pulse

Ultrafast heterogeneous electron transfer, including direct transition from the surface attached molecule into the semiconductor band states, is introduced with the focus on a system of perylene on TiO₂. The contribution of intramolecule transition and direct electron transition to the absorption spectra are analysed theoretically. By comparing with the intramolecule transition contributions, the ultrafast direct transition contributions to the absorption spectra with different physical parameters are analysed.