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首页> 外文期刊>Optics Letters >Strong coupling in macrocyclic thiophene investigated by time-resolved two-photon excited fluorescence
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Strong coupling in macrocyclic thiophene investigated by time-resolved two-photon excited fluorescence

机译：时间分辨双光子激发荧光研究大环噻吩中的强耦合

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摘要

We report the femtosecond dynamics of fluorescence anisotropy excited through the two-photon absorption(TPA), which provides direct signatures of delocalized electronic excitations for symmetrical macromolecular architectures. Two-photon excited fluorescence anisotropy is strongly correlated with the orientation and value of the transition moment from the excited state to the second and higher lying states. For macromolecular systems it leads to a relatively low initial fluorescence anisotropy and specific femtosecond anisotropy dynamics. We have experimentally demonstrated qualitatively different anisotropy dynamics for two- and one-photon absorption excitations for strongly coupled ring architecture prospective for artificial-light-harvesting applications and possessing an enhanced TPA-absorption cross section.
机译：我们报告通过双光子吸收（TPA）激发的荧光各向异性的飞秒动力学，它为对称大分子体系结构提供了离域电子激发的直接特征。双光子激发的荧光各向异性与从激发态到第二和更高的平躺态的跃迁矩的方向和值密切相关。对于大分子系统，它导致相对较低的初始荧光各向异性和特定的飞秒各向异性动力学。我们已经在实验上证明了强耦合环体系结构的两光子吸收和单光子吸收激发在质上的各向异性动力学，这些环动力学有望用于人工采光应用并具有增强的TPA吸收截面。

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