8th International Topical SPARC Workshop
and SPARC Lecture Days
Moscow, September 5-10, 2011 -
Information

Title:	Dr.
Family Name:	Strelkov
First Name:	Vasily
Gender:	male
E-Mail:	v-strelkovyandex.ru
Affiliation for Badge:	GPI, Moscow
Institute:	A.M.Prokhorov General Physics Institute of RAS
Address (Street):	Vavilova? 38
Postal Code, City:	119991, Moscow
Country:	Russia
Phone:	+7 499 135 0247
Fax:	+7 499 135 0270
Arrival Date:	September 5
Departure Date:	September 10
Type of Participation:	Regular
Are you a member of the SPARC collaboration ?:	No
I register for:	Topical SPARC Workshop
	Selected
Contribution Type:	Poster
Author(s):	V. V. Strelkov^{1}, M. A. Khokhlova^{1,2}, N.Yu. Shubin^{1}, D. Kilbane^{3}
Institute(s):	{1} A.M.Prokhorov General Physics Institute of RAS, Moscow, Russia {2} Moscow State University, Physics Department, Moscow, Russia {3} School of Physics, University College Dublin, Belfield, Dublin 4, Ireland
Title:	Resonant generation of high-order harmonics of intense laser field in metallic ions
Abstract:	Efficiency of high-order harmonic generation (HHG) via interaction of intense laser radiation with matter can be enhanced when the harmonic is resonant with the transition from the ground to the autoionizing state of the generating particle, as it was shown in experiments with plasma plumes [1,2]. In this paper we develop a theoretical model of resonant HHG suggested in Ref. [3], and apply this model for studying attosecond pulse generation via resonant HHG. The model is based on the well-known 3-step HHG model, but instead of the last step (radiative recombination from continuum to the ground state) the free electron is trapped by the parent ion, so that the system (parent ion + electron) lands in the autoionizing state, and then it relaxes to the ground state emitting XUV. The results of the numerical and analytical calculations based on this model are in good quantitative agreement with the experiments showing HHG enhancement up to two orders of magnitude when the harmonic is resonant with the transition frequency. Moreover, this model reproduces well the essential difference in HHG efficiency for different ions (see [1,2] and references therein). [1] R.A. Ganeev, L.B. Elouga Bom, J.-C. Kieffer, T. Ozaki, Phys. Rev. A, 75, 063806 (2007). [2] R. A. Ganeev, Physics-Uspekhi, 52, 55 (2009). [3] V.Strelkov, Phys. Rev. Lett., 104, 123901 (2010).

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