Vibrational relaxation dynamics in transient grating spectroscopy studied by rate equations based on time-dependent correlation function |
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| Authors: | Yu Guo-Yang Song Yun-Fei He Xing Zheng Xian-Xu Tan Duo-Wang Chen Jun Yang Yan-Qiang |
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| Institution: | 1. Center for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150001, China;2. National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China |
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| Abstract: | A modified model, a set of rate equations based on time-dependent correlation function, is used to study vibrational relaxation dynamics in transient grating spectroscopy. The dephasing, the population dynamics, and the vibrational coherence concerning two vibrational states are observed respectively in organic dye IR780 perchlorate molecules doped polyvinyl alcohol matrix. The result shows that in addition to the information concerning system-environment interaction and vibrational coherence, the vibrational energy transfer can be described by this modified model. |
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| Keywords: | transient grating population dynamics vibrational energy transfer |
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