We have performed simulations and analytic calculations that show strong carrier-envelope phase dependence in the ionization of hydrogen atoms using intense sub-cycle sub-femtosecond laser pulses. When the pulse width is comparable to the classical orbit time of the initial bound state, sine-like pulses can ionize more than cosine-like pulses that have the same fluence. This result is the opposite of what is expected from a tunneling-like model, where the ionization probability primarily depends on the peak amplitude of the electric field during the pulse.

中文翻译：

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强烈的子周期脉冲使氢的相位依赖性电离

我们进行了仿真和分析计算，结果表明，使用强子循环亚飞秒激光脉冲在氢原子的电离过程中具有很强的载流子-信封相位依赖性。当脉冲宽度与初始束缚状态的经典轨道时间相当时，与具有相同通量的余弦形脉冲相比，正弦形脉冲可以电离更多。此结果与类似隧道的模型的预期相反，在该模型中，电离概率主要取决于脉冲期间电场的峰值幅度。