Molecular dynamics in low vibrational states investigated by fs time-resolved coherent anti-Stokes Raman spectroscopy technique |
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| Authors: | Ping He Sining Li Yuanqin Xia Yong Yao |
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| Affiliation: | a National Key Laboratory of Science and Technology on Tunable laser, Institute of Opto-electronics, Harbin Insitute of Technology, 150080, Harbin , Chinab College of Foundation Science, Harbin University of Commerce, 150028, Harbin, Chinac Department of Electronic and Information Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, Guangdong Province, 518055, China |
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| Abstract: | The molecular dynamics process is investigated in this paper using a broadband fs time-resolved coherent anti-Stokes Raman spectroscopy (CARS) technique. By varying the timing of laser pulses, low vibrational states are started and studied on both the electronically excited B(3Π0u+) state and ground X(1Σ0g+) state of iodine in the gas phase at room temperature. According to change the pump wavelength or Stokes pulse as well as the wavelength of the detection window for the CARS signal, dynamics on different potential-energy surfaces can be accessed and detected by the CARS spectroscopy. Results show that the period of the oscillation is decreased for the excited B(3Π0u+) state as the wavelength of the pump pulses is increased, while it is increased for the ground X(1Σ0g+) state with the increase of the Stokes wavelength. |
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| Keywords: | Molecular dynamics Time-resolved spectroscopy Coherent anti-Stokes Raman scattering |
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