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Dynamics of Interaction of H2+ with Intense Ultrashort Laser Pulse |
| QU Wei-Xing;CHEN Zhao-Yang;ZHANG Wen-Qi;XU Zhi-Zhan |
| Laboratory for High Intensity Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800 |
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| Cite this article: |
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QU Wei-Xing, CHEN Zhao-Yang, ZHANG Wen-Qi et al 2000 Chin. Phys. Lett. 17 493-495 |
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Abstract The dynamic process of H2+ in intense ultrashort laser pulses with intensities of 1014 ~ 1015 W/cm2, wavelength of 532nm and duration of 22fs is theoretically investigated by using collinear model and numerically solving the time-dependent Schrodinger equation. The results show that: (1) the dissociation and dissociative ionization compete each other in the case of intensities between 2.5 x 1014 and 4.0 x 1014 W/cm2; (2) both the dissociation and the dissociative ionization are much smaller and appear at about 5 cycles (≈ 9 fs ) later than the ionization. In addition, we estimate the spectrum of high harmonic generation and find that the well-known cutoff rule is invalid for the ultrashort laser pulse (e.g. the duration ≤ 25fs), because the shorter pulse can produce higher order harmonics than the longer one.
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33.15.-e
33.80.Wz
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Published: 01 July 2000
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