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Harmonic Enhancement Mechanism of a Superposition State Atom Irradiated by Short Pulses |
| YANG Yu-Jun1,2;CHEN Ji-Gen3;HUANG Yu-Xin1;GUO Fu-Ming1;ZHANG Hong-Xing2;SUN Jia-Zhong2;ZHU Hong-Yu1;WANG Li1;WANG Hui1;ZHU Qi-Ren1 |
| 1Institute of Atomic and Molecular Physics, Jilin University, Changchun 1300122Institute of Theoretical Chemistry, Jilin University, Changchun 1300123Department of Physics, Taizhou University, Linhai 317000 |
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| Cite this article: |
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YANG Yu-Jun, CHEN Ji-Gen, HUANG Yu-Xin et al 2007 Chin. Phys. Lett. 24 1894-1897 |
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Abstract We investigate the high-order harmonic generation (HHG) of a model atom
whose initial state is prepared in a superposition of its ground state and an excited state irradiated by different duration laser pulses. Compared to the HHG generated from an atom whose initial state is in its ground state, its conversion efficiency obtains some enhancement. The enhancement originates from the higher ionization rate (rather than the ionization yield) of the atom with superposition initial state.
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| Keywords:
32.80.Rm
42.65.Ky
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Received: 05 December 2006
Published: 25 June 2007
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| PACS: |
32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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[6] Wang B B et al 2005 Phys. Rev. A 72 063412
[7] Javanainen J et al 1988 Phys. Rev. A 38 3430
[8] Burne K et al 1992 Phys. Rev. A 45 3347 |
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