Quasi-phasematching of harmonic generation via multimode beating in waveguides.
A new scheme for quasi-phasematching high harmonic generation (HHG) in gases is proposed. In this, the rapid variation of the axial intensity resulting from excitation of more than one mode of a waveguide is used to achieve quasi phasematching. Numerical modeling demonstrates enhancement of the harmonic signal over that achieved for a single coherence length by factors >10(4).
Dromey
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B
Zepf
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Landreman
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M
Hooker
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SM