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Measurement of the carrier-envelope phase of few-cycle laser pulses by use of asymmetric photoionization

机译:通过不对称光电离测量几个周期激光脉冲的载流子包络相位

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摘要

Using numerical solutions of the time-dependent Schrodinger equation for a hydrogen and a helium atom in a linearly polarized, few-cycle laser field, we calculate the photoelectron left-right asymmetry measured by two opposing detectors placed along the laser polarization vector, with the laser focus in the center. We find a simple dependence of this asymmetry on carrier-envelope (CE) phase φ for laser intensities slightly below the tunneling regime, which may allow us to measure (or to calibrate) and to stabilize the CE phase. In particular, we suggest that the condition of zero asymmetry for few-cycle pulses may be useful for both these goals.
机译:使用线性极化的少周期激光场中氢和氦原子随时间变化的薛定inger方程的数值解,我们计算了沿激光偏振矢量放置的两个相对检测器测量的光电子左右不对称性,激光聚焦在中心。对于稍微低于隧穿状态的激光强度,我们发现这种不对称性与载波包络(CE)相位φ的简单相关性,这可能使我们能够测量(或校准)并稳定CE相位。特别是,我们建议几个周期脉冲的零不对称条件可能对这两个目标都有用。

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