双光子吸收表征及相关光物理机制

Nonlinear Characterization and Related Photophysics of Two-Photon Absorption

双光子吸收材料在高分辨生物成像、光动力学治疗和光限幅等领域备受关注。新型双光子吸收材料创制涉及非线性光学性质表征、光物理机制解析和构效关系构建。本文探讨了双光子吸收相关的光物理跃迁机制、开孔Z-扫描与双光子激发荧光方法的区别联系以及激光光源特性对双光子吸收性能测试结果的影响,最后对该领域进行展望。

Two-photon absorption(2PA)and two-photon excited fluorescence(2PEF)have received extensive attention due to their potential applications in the fields of high-resolution bioimaging,photodynamic therapy,optical power limiting,three-dimensional microfabrication and high-capacity data storage,etc.Innovative preparation of novel 2PA materials involves nonlinear optical characterization,photophysical studies and the underlying structure-property relationships.2PA and 2PEF feature the characteristics of interdisciplinary and cross-fields.Aiming to prompt the development of 2PA mechanics and guide for designing efficient 2PA materials,we identify several key questions related to the photophysical processes and characterization methods of 2PA.The effect of laser characteristics on the nonlinear results is illustrated based on our research contributions and the future perspective and challenges in this field are also pointed out.