通过三重态-三重态湮灭上转换实现空间受限光激发
Spatially confined photoexcitation with triplet-triplet annihilation upconversion.
作者信息
Wang Zhijia, Hou Yuqi, Huo Zepeng, Liu Qiang, Xu Weiqing, Zhao Jianzhang
机构信息
State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, E-208 West Campus, 2 Ling-Gong Road, Dalian 116024, P. R. China.
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun, 130012, P. R. China.
出版信息
Chem Commun (Camb). 2021 Sep 9;57(72):9044-9047. doi: 10.1039/d1cc03309c.
Two-photon absorption (TPA) has been widely used in confocal microscopy, photo-initiated three-dimensional (3D) polymerization, and 3D-micro/nanofabrication. These applications are based on the spatial confinement of the TPA excitation, due to the quadratic excitation power dependency of the excitation. However, an expensive and high-power femtosecond (fs) pulsed laser has to be used. Herein, we show a new technique as a promising alternative to the TPA to achieve spatially confined excitation, but no fs laser and TPA dyes are required. This new spatially confined excitation with a continuous wave laser is based on triplet-triplet-annihilation upconversion. The potential of the new technique was demonstrated by spatially confined photopolymerization.
双光子吸收（TPA）已广泛应用于共聚焦显微镜、光引发三维（3D）聚合和3D微纳加工。由于激发的二次激发功率依赖性，这些应用基于TPA激发的空间限制。然而，必须使用昂贵的高功率飞秒（fs）脉冲激光。在此，我们展示了一种新技术，作为TPA的一种有前景的替代方法，可实现空间限制激发，但无需飞秒激光和TPA染料。这种基于连续波激光的新型空间限制激发是基于三重态-三重态湮灭上转换。通过空间限制光聚合证明了该新技术的潜力。
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