Optically Induced Anisotropy in Time-Resolved Scattering: Imaging Molecular-Scale Structure and Dynamics in Disordered Media with Experiment and Theory,Physical Review Letters

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Optically Induced Anisotropy in Time-Resolved Scattering: Imaging Molecular-Scale Structure and Dynamics in Disordered Media with Experiment and Theory
Physical Review Letters ( IF 8.1 ) Pub Date : 2022-07-29 , DOI: 10.1103/physrevlett.129.056001
Andrés Montoya-Castillo ₁ , Michael S Chen ₂ , Sumana L Raj ₃ , Kenneth A Jung ₂ , Kasper S Kjaer ₃ , Tobias Morawietz ₂ , Kelly J Gaffney ₃ , Tim B van Driel ₄ , Thomas E Markland ₂

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Time-resolved scattering experiments enable imaging of materials at the molecular scale with femtosecond time resolution. However, in disordered media they provide access to just one radial dimension thus limiting the study of orientational structure and dynamics. Here we introduce a rigorous and practical theoretical framework for predicting and interpreting experiments combining optically induced anisotropy and time-resolved scattering. Using impulsive nuclear Raman and ultrafast x-ray scattering experiments of chloroform and simulations, we demonstrate that this framework can accurately predict and elucidate both the spatial and temporal features of these experiments.

中文翻译：

时间分辨散射中的光学诱导各向异性：用实验和理论对无序介质中的分子尺度结构和动力学进行成像

时间分辨散射实验能够以飞秒时间分辨率在分子尺度上对材料进行成像。然而，在无序介质中，它们仅提供一个径向维度，从而限制了对定向结构和动力学的研究。在这里，我们介绍了一个严格而实用的理论框架，用于预测和解释结合光学诱导各向异性和时间分辨散射的实验。使用脉冲核拉曼和氯仿的超快 X 射线散射实验和模拟，我们证明该框架可以准确地预测和阐明这些实验的空间和时间特征。

更新日期：2022-07-29

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