Intensity-dependent asymmetric photoionization in few-cycle laser pulses

• 来源期刊: 中国物理B（英文版）
• 关键词: asymmetric photoionization few-cycle laser pulses
• 年，卷（期）: 2009,（3）
• 页码范围: 1014-1018
• 页数: 5页
• 语种: 英文

摘要

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.