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PHOTOEXCITATION OF ATOM WITH ULTRASHORT LASER PULSES
Authors:Dai Chang-jian and Chen Zi-dong
Affiliation:Department of Physics, Zhejiang University, Hangzhou 310027, China; Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing 312000, China
Abstract:The uncoupled basis set is used to describe the interaction between the ultrashort pulses and the Na atom. Several polarization configurations of laser pulses have been investigated, which produce different effects on the two-step photoexcitation process. The study shows that the final states of the transitions driven by ultrashort laser pulses have a strong dependence on the laser polarization configuration. A comparison of the two different basis sets shows that the uncoupled basis set may provide more information than the coupled basis set, such as angular distribution of the atom in the final states of the transitions.
Keywords:ultrashort laser pulse   polarization configuration   wave packet evolution
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