Using the focal phase to control attosecond processes
Using the focal phase to control attosecond processes
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DOI：
10.1088/2040-8986/aa9247
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发表时间：
2017-12-01
影响因子：
2.1
通讯作者：
Sayler, A. M.
中科院分区：
文献类型：
--
作者：
Hoff, Dominik;Krueger, Michael;Sayler, A. M.
聚焦宽带光电场的空间演化对于许多新兴的阿秒技术来说是至关重要的。文中讨论了入射光束参数对焦域内几个周期激光脉冲演化的影响。具体地，我们详细描述了频率相关的输入光束几何形状、啁啾和色差如何影响聚焦中载波包络相位(CEP)、中心频率和脉冲持续时间的空间相关性。通过对典型的几周脉冲激光焦点中的CEP演化的直接三维测量证实了这些效应，该测量使用电子在金属纳米尖端的再散射并结合CEP米。此外，我们还展示了一种简单的测量技术，可以通过输入光束参数来估计焦点CEP的演化。这些参数可以以新的方式使用，以控制阿秒动力学并定制高度非线性的光-物质相互作用。
The spatial evolution of the electric field of focused broadband light is crucial for many emerging attosecond technologies. Here the effects of the input beam parameters on the evolution of few-cycle laser pulses in the focus are discussed. Specifically, we detail how the frequency-dependent input beam geometry, chirp and chromatic aberration can affect the spatial dependence of the carrier-envelope phase (CEP), central frequency and pulse duration in the focus. These effects are confirmed by a direct, three-dimensional measurement of the CEP-evolution in the focus of a typical few-cycle pulse laser using electron rescattering at metal nanotips in combination with a CEP-metre. Moreover, we demonstrate a simple measurement technique to estimate the focal CEP evolution by input-beam parameters. These parameters can be used in novel ways in order to control attosecond dynamics and tailor highly nonlinear light-matter interactions.