Abstract
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 language | English |
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Article number | 143901 |
Journal | Physical Review Letters |
Volume | 99 |
Issue number | 14 |
DOIs | |
Publication status | Published - 01 Oct 2007 |
ASJC Scopus subject areas
- General Physics and Astronomy