Silva Francisco, Teichmann Stephan M, Cousin Seth L, Hemmer Michael, Biegert Jens
ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
1] ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain [2] ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain.
Nat Commun. 2015 Mar 19;6:6611. doi: 10.1038/ncomms7611.
Attosecond pulses at photon energies that cover the principal absorption edges of the building blocks of materials are a prerequisite for time-resolved probing of the triggering events leading to electronic dynamics such as exciton formation and annihilation. We demonstrate experimentally the isolation of individual attosecond pulses at the carbon K-shell edge (284 eV) in the soft X-ray water window with pulse duration below 400 as and with a bandwidth supporting a 30-as pulse duration. Our approach is based on spatiotemporal isolation of long-wavelength-driven harmonics and validates a straightforward and scalable approach for robust and reproducible attosecond pulse isolation.
在光子能量覆盖材料基本组成部分的主要吸收边时产生阿秒脉冲，是对诸如激子形成和湮灭等导致电子动力学的触发事件进行时间分辨探测的先决条件。我们通过实验证明，在软X射线水窗中的碳K壳层边缘（284 eV）实现了单个阿秒脉冲的分离，脉冲持续时间低于400阿秒，带宽支持30阿秒的脉冲持续时间。我们的方法基于长波长驱动谐波的时空隔离，并验证了一种直接且可扩展的方法，用于可靠且可重复的阿秒脉冲分离。
