Particular features of higher harmonics generation in nanocluster-containing plasmas using single- and two-color pumps |
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| Authors: | R A Ganeev H Singhal P A Naik J A Chakera M Tayyab A K Srivastava T S Dhami M P Joshi A Singh R Chari S R Kumbhare R P Kushwaha R A Khan R K Bhat P D Gupta |
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| Institution: | 1. Raja Ramanna Centre for Advanced Technology, 452013, Indore, India
2. Institute of Electronics, Uzbekistan Academy of Sciences, 100125, Tashkent, Uzbekistan
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| Abstract: | The wavelength conversion of femtosecond laser pulses in laser plasmas containing clusters of different nature and dimension (fullerenes, metal nanoparticles) is studied. Pulses of a titanium-sapphire laser are used in combination with orthogonally polarized second-harmonic pulses as radiation to be converted. Variations in the generation efficiency of higher harmonics are analyzed under conditions of phase-modulated pulses. It is shown that the optimization of components of a nonlinear optical plasma medium, of plasma excitation conditions by single- and two-color pumps, and of phase and spectral parameters of radiation to be converted leads to a considerable increase in the generation efficiency of higher harmonics. |
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