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Kinetics of third-order nonlinear optical susceptibilities in alkynyl ruthenium complexes

机译：炔基钌配合物三阶非线性光学敏感性的动力学

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Kinetics of third-order optical susceptibilities obtained for a new series of alkynyl ruthenium complexes was investigated in using pump-dependent transmission experiment and the degenerate four-wave mixing (DFWM) technique. We investigate electron rich σ-acet-ylide ruthenium complexes in which the d-transition metal is incorporated in the same plane as the π-system of formyl alkynyl ligands. The obtained results show that the presence of a bilaterally ligands leads to substantial increase of the χ~(< 3 >). The maximally achieved third optical susceptibility was χ~(< 3 >) = 0.9 x 10~(-20) m~2 V~(-2) at λ = 0.53 μm for chloroform solution concentration 0.4 mol l~(-1). The value of second-order optical hyperpolarizabilities γ for the investigated compounds were four orders of magnitude larger compared to the known values of CS_2. The quasi-periodic relaxation time kinetics of the DFWM with period about 7 ns was found after switching off the pumping beams. Such kinetics of the DFWM is explained by tunnelling between the occupied d-transition metal levels and electron-phonon trapping levels after interruption of the pumping signals.
机译：在使用泵依赖的传动实验和退化的四波混合（DFWM）技术中，研究了用于新的炔基钌配合物的三阶光学敏感性的动力学。我们研究了电子富σ-ylide钌配合物，其中D-过渡金属掺入与炔芳基炔基配体的π-系统相同的平面中。得到的结果表明，双侧配体的存在导致β-（<3>）的显着增加。最大达到的第三光学敏感性是λ=0.53μm的α〜（3）= 0.9×10〜（-20）m〜2 V〜（-2）。氯仿溶液浓度为0.4mol l〜（-1）。与所知道的CS_2的已知值相比，所研究化合物的二阶光学超引发γ的值为4个数量级。在关闭泵送梁后发现了DFWM的准周期性放松时间动力学，在泵送梁断开后发现了约7个NS。通过在泵送信号中断之后占用的D-过渡金属水平和电子 - 声子俘获水平之间通过隧穿来解释DFWM的这种动力学。

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