Intensity-dependent asymmetric photoionization in few-cycle laser pulses |
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Authors: | Zhang Xiao-Ming Zhang Jing-Tao Gong Qi-Huang and Xu Zhi-Zhan |
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Institution: | State Key Laboratory for High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China; State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, China |
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Abstract: | The asymmetric photoionization of atoms irradiated by intense,
few-cycle laser pulses is studied numerically. The results show that
the pulse intensity affects the asymmetric photoionization in three
aspects. First, at higher intensities, the asymmetry becomes
distinctive for few-cycle pulses of longer durations. Second, as the
laser intensity increases, the maximal asymmetry first decreases
then increases after it has reached a minimal value. Last, the value
of the carrier-envelope phase corresponding to the maximal asymmetry
varies with the pulse intensity. This study reveals that the
increasing of pulse intensity is helpful for observing the
asymmetric photoionization. |
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Keywords: | asymmetric photoionization few-cycle laser pulses |
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