We characterize an attosecond pulse without using a secondary laser pulse. Instead, we use the carrier-envelope-phase dependence of the extreme ultraviolet (XUV) emission to measure the dipole current from a solid material. To confirm, we apply our approach to data derived by solving the time-dependent Schrödinger equation with a periodic potential. Finally, using MgO, we measure the delay shift at the strong XUV absorption feature and explain it as the quantum interference between the continuum and bound states that participate in the generation process.

中文翻译：

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延迟测量固体中的阿秒发射

我们无需使用辅助激光脉冲就可以表征阿秒脉冲。取而代之的是，我们使用极紫外（XUV）发射的载流子-包络相依赖性来测量固体材料的偶极电流。为了证实这一点，我们将我们的方法应用于通过求解具有周期势的时间相关的Schrödinger方程得出的数据。最后，使用MgO，我们测量了在强XUV吸收特征下的延迟位移，并将其解释为参与生成过程的连续态与束缚态之间的量子干扰。