Abstract The photon emission spectrum of the hydrogen atoms in an intense high-frequency laser pulse is simulated by using one-dimensional soft Coulomb potential. Regular fine structures appear on the two sides of both the odd and even multiples of photon energy of the laser field besides the ordinary odd harmonic peaks. It is proved that the splits of the fine structures are responsible for hyper-Raman lines and the energy spacing between the odd harmonic lines is equal to the difference in energy between the eigenstates with the same parity of the time averaged Krameters-Henneberger (KH) potential. By analysing the features of the fine structures, we also verify that the so-called even order harmonics under the stabilization condition are indeed hyper-Raman lines caused by the transitions between the dressed atomic states with different values of parity.
Received: 16 January 2008
Revised: 19 September 2008
Accepted manuscript online:
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
Fund: Project supported by the National
Natural Science Foundation of China (Grant No 10734140), the
National Basic Research Program of China (Grant No 2007CB815105) and
the National High Technology Research and Development Program for
Inertial Confinement Fusi
Cite this article:
Zhou Zhao-Yan (周兆妍), Yuan Jian-Min (袁建民) Fine splits of photon emission spectrum of hydrogen atom caused by transitions between different dressed states in intense high frequency laser field 2008 Chin. Phys. B 17 4523
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