Comparative study of low-order harmonic generation in gas and cluster media at Ti:Sa femtosecond laser intensity up to 2000 TW/cm<sup>2</sup>
I. A. ZhvaniyaFaculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory bld.1/2, 119991, Moscow, RussiaM S DzhidzhoevFaculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory bld.1/2, 119991, Moscow, RussiaTimur A. SemenovFSRC «Crystallography and Photonics» RAS, Svyatoozerskaya 1, 140700, Shatura, Moscow Region, RussiaA. B. Savel’evFaculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory bld.1/2, 119991, Moscow, RussiaS. Yu. StremoukhovFaculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory bld.1/2, 119991, Moscow, RussiaT. UsmanovArifov Institute of Ion-Plasma and Laser Technologies, 33 Dormon Yoli Street, Tashkent 100125, UzbekistanV. M. GordienkoFaculty of Physics, M. V. Lomonosov Moscow State University, Leninskie Gory bld.1/2, 119991, Moscow, Russia
ABI
Аннотация
Abstract In comparative experiments, it was found that the maximum efficiency of third harmonic generation (THG) in cluster nanoplasma was ∼9x10 −5 and was approximately 4 times less effective than the case of THG in gas under similar experimental conditions. This result is consistent with theoretical calculations and show that THG amplitude in a gas is about an order of magnitude higher than in a cluster medium. The discrepancy between the THG efficiency in gas and clusters obtained theoretically and experimentally in discussed.
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