Kovács Katalin, Tosa Valer
National Institute for R&D of Isotopic and Molecular Technologies, RO, 400293, Cluj-Napoca, Romania.
Sci Rep. 2020 Apr 30;10(1):7392. doi: 10.1038/s41598-020-64373-x.
We demonstrate that two different single attosecond pulses (SAP) can be obtained from naturally separated spectral domains formed during high-order harmonic generation and propagation in a gas medium. We propose a feasible experimental configuration in which one can obtain an SAP in a lower energy domain (<300 eV), or another SAP in a higher energy domain (>300 eV). Without filtering, a double attosecond pulse emission with fixed temporal separation is obtained. The gap between the two spectral domains is close to the onset of the water window.
我们证明，可以从气体介质中高次谐波产生和传播过程中自然分离的光谱域获得两种不同的单个阿秒脉冲（SAP）。我们提出了一种可行的实验配置，在该配置中，可以在较低能量域（<300 eV）获得一个SAP，或者在较高能量域（>300 eV）获得另一个SAP。无需滤波，即可获得具有固定时间间隔的双阿秒脉冲发射。两个光谱域之间的间隙接近水窗的起始位置。
