中国物理B ›› 2001, Vol. 10 ›› Issue (5): 403-406.doi: 10.1088/1009-1963/10/5/308

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PHOTOEXCITATION OF ATOM WITH ULTRASHORT LASER PULSES

戴长建1, 陈子栋2   

  1. (1)Department of Physics, Zhejiang University, Hangzhou 310027, China; (2)Department of Physics, Zhejiang University, Hangzhou 310027, China; Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing 312000, China
  • 收稿日期:2000-09-04 修回日期:2000-11-15 出版日期:2001-05-15 发布日期:2005-06-12
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 19774048), the Inertial Confinement Fusion Foundation of the China National High Technology Development Program, and the Natural Science Foundation of Zhejiang Province, Chin

PHOTOEXCITATION OF ATOM WITH ULTRASHORT LASER PULSES

Dai Chang-jian (戴长建)a, Chen Zi-dong (陈子栋)ab   

  1. a Department of Physics, Zhejiang University, Hangzhou 310027, China; b Department of Physics, Shaoxing College of Arts and Sciences, Shaoxing 312000, China
  • Received:2000-09-04 Revised:2000-11-15 Online:2001-05-15 Published:2005-06-12
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 19774048), the Inertial Confinement Fusion Foundation of the China National High Technology Development Program, and the Natural Science Foundation of Zhejiang Province, Chin

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摘要： 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.

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.

Key words: ultrashort laser pulse, polarization configuration, wave packet evolution

中图分类号:  (Photoionization of atoms and ions)

  • 32.80.Fb
42.60.Jf (Beam characteristics: profile, intensity, and power; spatial pattern formation)