Enhancement of two-color high harmonic by using two compound strong ionic transitions in double-target scheme
Masayuki SuzukiThe University of Tokyo The Institute for Solid State Physics, , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, JapanR. A. GaneevAcademy of Sciences of Uzbekistan Scientific Association Akadempribor, , Akademgorodok, Tashkent 700125, UzbekistanT. OzakiInstitut National de la Recherche Scientifique , 1650 boul. Lionel-Boulet, Varennes (Quebec) Canada J3X 1S2Motoyoshi BabaThe University of Tokyo The Institute for Solid State Physics, , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, JapanHiroto KurodaThe University of Tokyo The Institute for Solid State Physics, , 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan
ABI
Аннотация
The authors generated high-order harmonics by using the two-component laser-ablation plumes, which were irradiated by a femtosecond laser pulse. The harmonic spectra from double-target schemes comprised those obtained from separate targets. For indium/chromium plumes, the enhancement of two harmonics (13th and 29th orders) was obtained at the wavelengths of 61.15 and 27.41nm, respectively. The conversion efficiencies of these two harmonics were estimated to be 10−5. The authors attribute the enhancement of 13th and 29th harmonics to the multiphoton resonances with the strong radiative transitions of ions in indium and chromium plumes, respectively.
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