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A Scaling Law of Photoionization in Ultrashort Pulses |
| ZHANG Xiao-Ming1;ZHANG Jing-Tao2;BAI Li-Hua2;GONG Qi-Huang1;XU Zhi-Zhan2 |
| 1State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100087
2State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Shanghai 201800 |
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| Cite this article: |
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ZHANG Xiao-Ming, ZHANG Jing-Tao, BAI Li-Hua et al 2006 Chin. Phys. Lett. 23 1803-1805 |
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Abstract By means of the numerical solution of time-dependent Schrödinger equation, we verify a scaling law of photoionization in ultrashort pulses. We find that for a given carrier-envelope phase and duration of the pulse, identical photoionizations are obtained provided that when the central frequency of the pulse is enlarged by k times, the atomic binding potential is enlarged by k times, and the laser intensity is enlarged by k3 times. The scaling law allows us to reach a significant control over direction of photoemission and offers exciting prospects of reaching similar physical processes in different interacting systems which constitutes a novel kind of coherent control.
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| Keywords:
42.65.Ky
42.65.Re
32.80.Rm
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Published: 01 July 2006
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| PACS: |
42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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