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RELATIVISTIC STRONG-FIELD PHOTOIONIZATION

被引：153
|
作者：
REISS, HR
机构：
[1] Department of Physics, American University, Washington, DC
来源：
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS | 1990年 / 7卷 / 04期
关键词：
D O I：
10.1364/JOSAB.7.000574
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
A systematic development is presented of a strong-field method for photoionization of atoms and molecules. The strong-field requirement demands a relativistic treatment. A Dirac theory is developed. The exact S matrix is expanded on the premise that the plane-wave field is stronger than the binding of the atom or molecule. The leading term of this expansion is the strong-field approximation. This general method is applied to photoionization from the ground state of a Dirac hydrogenic atom by circularly polarized monochromatic radiation. Numerical examples show that relativistic effects should be discernible with present-day pulsed lasers. The nonrelativistic limit is exactly one of the standard forms of the Keldysh or Keldysh-Faisal-Reiss approximation. © 1990 Optical Society of America.
引用
收藏
页码：574 / 586
页数：13
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