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Chin. Phys. B, 2010, Vol. 19(12): 123301    DOI: 10.1088/1674-1056/19/12/123301

Influence of laser fields on the vibrational population of molecules and its wave-packet dynamical investigation

Wang Juna, Liu Fanga, Yue Da-Guanga, Zhao Juana, Xu Yana, Meng Qing-Tianb, Liu Wing-Kic
a College of Physics and Electronics, Shandong Normal University, Jinan 250014, China; b College of Physics and Electronics, Shandong Normal University, Jinan 250014, China;Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1; c Department of Physics and Astronomy, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
Abstract  The time-dependent wave packet method is used to investigate the influence of laser-fields on the vibrational population of molecules. For a two-state system in laser fields, the populations on different vibrational levels of the upper and lower electronic states are given by wavefunctions obtained by solving the Schrödinger equation with the split-operator method. The calculation shows that the field parameters, such as intensity, wavelength, duration, and delay time etc. can have different influences on the vibrational population. By varying the laser parameters appropriately one can control the evolution of wave packet and so the vibrational population in each state, which will benefit the light manipulation of atomic and molecular processes.
Keywords:  vibrational population      intense laser field      time-dependent wave packet method      light-matter interaction     
Received:  24 January 2010      Published:  15 December 2010
PACS:  33.15.Mt (Rotation, vibration, and vibration-rotation constants)  
  33.80.-b (Photon interactions with molecules)  
Fund: Project supported by the Natural Science Foundation of Shandong Province of China (Grant No. Y2006A23), the National Basic Research Program of China (Grant No. 2006CB806000), and the Open Fund of the State Key Laboratory of High Field Laser Physics (Shanghai Institute of Optics and Fine Mechanics).

Cite this article: 

Wang Jun, Liu Fang, Yue Da-Guang, Zhao Juan, Xu Yan, Meng Qing-Tian, Liu Wing-Ki Influence of laser fields on the vibrational population of molecules and its wave-packet dynamical investigation 2010 Chin. Phys. B 19 123301

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