Strong resonance enhancement of a single harmonic generated in the extreme ultraviolet range
R. A. GaneevThe Institute for Solid State Physics, University of Tokyo, Chiba, Japan. [email protected]Masayuki SuzukiUniversity of TokyoMotoyoshi BabaUniversity of TokyoHiroto KurodaUniversity of TokyoT. OzakiInstitut National de la Recherche Scientifique
2006en
ABI
Аннотация
We report the demonstration of strong resonance enhancement of a single high-order harmonic in the extreme ultraviolet (XUV) region generated from the interaction of a femtosecond pulse with low-ionized In ablation. A strong 13th harmonic (61.2 nm) of Ti:sapphire laser radiation with output intensity almost two orders of magnitude higher than neighboring harmonics was observed in these studies. The high conversion efficiency of the 13th harmonic (8 x 10(-5)) is attributed to multiple collisions of electron trajectories with the origin due to multiphoton resonance with the In ion.
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