Systematic studies of two-color pump-induced high-order harmonic generation in plasma plumes
R. A. GaneevInstitute of Electronics, Akademgorodok, 33, Dormon Yoli Street, Tashkent 100125, UzbekistanH. SinghalRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaP. A. NaikRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaJ. A. ChakeraRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaH. VoraRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaRaees Ahmad KhanRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaP. D. GuptaRaja Ramanna Centre for Advanced Technology, Indore 452013, India
ABI
Аннотация
High-order harmonic generation (HHG) has been studied in various laser-produced plasma plumes using a two-color orthogonally polarized beam with a 12:1 energy ratio between the fundamental and second-harmonic (SH) components. The influence of the relative phase between the fundamental and SH waves on the HHG efficiency has been investigated. Odd and even harmonic generation in plasma plumes containing nanoparticles, fullerenes, carbon nanotubes, and other samples was optimized. The effect of the variation in the SH intensity on the HHG conversion efficiency in carbon aerogel and silver plasma plumes has also been studied. It is shown that by increasing the SH intensity, one can generate only even harmonics by suppressing the odd harmonics.
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