English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Extreme ultraviolet (XUV) attosecond pulses, generated by a process known aslaser-induced electron recollision, are a key ingredient for attosecondmetrology, providing a tool to precisely initiate and probe sub-femtoseconddynamics in the microcosms of atoms, molecules and solids[1]. However, with thecurrent technology, extending attosecond metrology to scrutinize the dynamicsof the inner-shell electrons is a challenge, that is because of the lowerefficiency in generating the required soft x-ray \hbar\omega>300 eV attosecondbursts and the lower absorption cross-sections in this spectral range. A wayaround this problem is to use the recolliding electron to directly initiate thedesired inner-shell process, instead of using the currently low flux x-rayattosecond sources.Such an excitation process occurs in a sub-femtosecondtimescale, and may provide the necessary "pump" step in a pump-probeexperiment[2]. Here we used a few cycle infrared \lambda_{0}~1800nm source[3]and observed direct evidences for inner-shell excitations through thelaser-induced electron recollision process. It is the first step towardtime-resolved core-hole studies in the keV energy range with sub-femtosecondtime resolution.

Direct evidences for inner-shell electron-excitation by laser induced electron recollision