论文标题
分子取向引起的第二次谐波生成：解密不同的贡献
Molecular Orientation-Induced Second Harmonic Generation: deciphering different contributions apart
论文作者
论文摘要
我们演示和探索一种用于直接监测气相分子集合的方向动力学的全光学技术。称为“ moish”的技术利用了极性气介质的瞬时反转对称性，并提供了第二次谐波产生信号的敏感且空间局部的探测，该探测与气体的方向直接相关。我们的实验结果揭示了对整个非线性光学信号的选择性电子和核动力学贡献，并使用“报告基因气体”方法将其分开。 “ Moish”提供了通过协同的Terahertz和光场激发来探索受控旋转动力学的新的至关重要手段。
We demonstrate and explore an all-optical technique for direct monitoring the orientation dynamics of gas phase molecular ensembles. The technique termed 'MOISH' utilizes the transiently lifted inversion symmetry of polar gas media and provides a sensitive and spatially localized probing of second harmonic generation signal that is directly correlated with the orientation of the gas. Our experimental results reveal selective electronic and nuclear dynamical contributions to the overall nonlinear optical signal and decipher them apart using the "reporter gas" approach. 'MOISH' provides new, crucial means for exploring controlled rotational dynamics via concerted terahertz and optical field excitation.
