Recently , with the development of experiments , numerous organic materials that exhibit large tpa cross sections have been synthesized in different laboratories 近年来，随着实验技术的日益发展，实验合成了大量具有大双光子吸收截面的有机材料。
It is show that , for the ultraviolet pre - ionization tea co2 laser , the absorption of two photos in the process of the photo - ionization plays an important role 研究表明，在紫外预电离teaco _ 2激光器中的光离化过程中双光子吸收起着十分重要的作用。
Furthermore , the upconvesion luminescence < wp = 8 > about 650nm and 808nm is also reached . they respectively belonged to three - photon and two - photon absorption 另外，也对650nm波长和808nm波长的上转换发光进行了研究，证明它们分别是三光子吸收和两光子吸收过程。
The results indicate that for one dimension center conjugated organic molecules , the tree - state model can well calculate its low - excited states tpa cross sections 研究结果表明，对于一维体系的对称型共轭分子，三态模型可以很好地给出低激发态的双光子吸收截面。
The stronger t he electron - donor is , the more significant the solvent effect is for molecules with a given center . the structure of this thesis is as follows 在中心和受体一定的情况下，硕士学位论文中文摘要给体的供电子能力越强，溶剂对分子的双光子吸收的影响越大。
Numeric simulation showed that for the closed - aperture z - scan considering the two - photon absorption , the simulation results were well consistent with the conventional theory 对于考虑双光子吸收的河南大学光学专业2001级硕士论文闭孔z一扫描曲线，其结果与经典的z一扫描理论的结果也完全一致。
Complex 3 - dimension ( 3d ) microstructures can be constructed using this technique with the advantages of being maskless , single step , real 3d structure and high resolution 我们展示了一个有潜力应用于组织工程及生医领域之新颖的微制造技术双光子吸收光致聚合法，它所使用之基材为液态高分子材料。
Theoretical calculations can not only predict the two - photon absorption intensity but also provide guideline and help for synthesis of new materials with large tpa cross sections 利用理论模型不仅可以对分子的双光子吸收强弱进行预测，还可以为实验合成具有大双光子吸收截面的分子提供重要的理论依据和指导。
And as time as organic synthesis technology goes ahead , more and more organic compounds with great tpa properties appear . so , this thesis studies a series of organic molecules in gas and in solutions 本论文对有机分子气态及其在溶液中的双光子吸收特性进行了理论研究，对于寻找及合成强双光子吸收材料将具有指导作用。
The results of experiments show that the most efficient tpa materials seem to be the ones with various electron - donor ( d ) and electron - acceptor ( a ) moieties attached symmetrically or asymmetrically to a center 实验结果显示，最有效的双光子吸收材料是由电子给体和电子受体对称或反对称的与一个中心结合而成的系统。
