Spatiotemporal isolation of attosecond soft X-ray pulses in the water window

Francisco Silva, Stephan M. Teichmann, Seth L. Cousin, Michael Hemmer and Jens Biegert ()
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Francisco Silva: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park
Stephan M. Teichmann: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park
Seth L. Cousin: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park
Michael Hemmer: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park
Jens Biegert: ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park

Nature Communications, 2015, vol. 6, issue 1, 1-6

Abstract: Abstract 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.

Date: 2015
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DOI: 10.1038/ncomms7611

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