Bright quasi-phase-matched soft-x-ray harmonic radiation from argon ions

Matthew Zepf, Brendan Dromey, M. Landreman, P. Foster, S.M. Hooker

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121 Citations (Scopus)


Selective enhancement (> 10(3)) of harmonics extending to the water window (similar to 4 nm) generated in an argon gas filled straight bore capillary waveguide is demonstrated. This enhancement is in good agreement with modeling which indicates that multimode quasi-phase-matching is achieved by rapid axial intensity modulations caused by beating between the fundamental and higher-order capillary modes. Substantial pulse energies (> 10 nJ per pulse per harmonic order) at wavelengths beyond the carbon K edge (similar to 4.37 nm, similar to 284 eV) up to similar to 360 eV are observed from argon ions for the first time.
Original languageEnglish
Article number143901
JournalPhysical Review Letters
Issue number14
Publication statusPublished - 01 Oct 2007

ASJC Scopus subject areas

  • General Physics and Astronomy


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