| Original Articles |
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Temporal Behaviour of Harmonics from One-Dimensional H+2 in an Ultrashort Laser Pulse |
| QU Wei-Xing1;XIA Yu-Xing2;GAN Ming-Long3;LI Ru-Xin1;XU Zhi-Zhan1 |
| 1Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Applied Physics Department, Shanghai Jiao Tong University, Shanghai 200030
3Department of Computer Science and Technology, Shanghai Jiao Tong University, Shanghai 200030 |
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| Cite this article: |
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QU Wei-Xing, XIA Yu-Xing, GAN Ming-Long et al 2001 Chin. Phys. Lett. 18 1050-1052 |
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Abstract With the method of wavelet transform, we consider the temporal
behaviour of high-order harmonic generation from one-dimensional H+2 exposed to an ultrashort laser pulse with a duration of tens of femtoseconds. The results, which are calculated by numerically solving the corresponding time-dependent Schrödinger equation with the split-operator method in the non-Born-Oppenheimer approach, show that: (1) The high-order harmonics in the cut-off range emitted as a train of pulses have better coherence than those in the plateau. (2) The harmonics are emitted early in time when the intensity of laser pulse increases.
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| Keywords:
33.80.Wz
42.50.Hz
42.65.Ky
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Published: 01 August 2001
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| PACS: |
33.80.Wz
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(Other multiphoton processes)
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42.50.Hz
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(Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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