Ionization rates and harmonic generation for H interacting with laser pulses of λ = 1064 nm and peak intensities in the range 2 x 1013-2 x 1014 W cm-2

Dionissopoulou, S; Mercouris, Th; Nicolaides, CA

dc.contributor.author	Dionissopoulou, S	en
dc.contributor.author	Mercouris, Th	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:44:46Z
dc.date.available	2014-03-01T01:44:46Z
dc.date.issued	1996	en
dc.identifier.issn	09534075	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24478
dc.title	Ionization rates and harmonic generation for H interacting with laser pulses of λ = 1064 nm and peak intensities in the range 2 x 1013-2 x 1014 W cm-2	en
heal.type	journalArticle	en
heal.identifier.primary	10.1088/0953-4075/29/20/028	en
heal.identifier.secondary	http://dx.doi.org/10.1088/0953-4075/29/20/028	en
heal.publicationDate	1996	en
heal.abstract	We applied the state-specific expansion approach (SSEA) to the solution of the time-dependent Schrödinger equation describing the interaction of H with laser pulses of λ = 1064 nm and peak intensities I0 = 2 x 1013, 6 x 1013, 1 x 1014 and 2 x 1014 W cm-2, and computed ionization rates and high-order harmonic spectra. For the first three cases, our results are compared with those of Krause and co-workers (Krause J L, Schafer K J and Kulander K C 1992 Phys. Rev. A 45 4998) who employed the grid method. Whereas for I0 = 1 x 1014 W cm-2 convergence difficulties were reported for the grid method, no such difficulties were found for the SSEA. Given this fact, we tackled the problem of computing the harmonic spectrum for I0 = 2 x 1014 W cm-2, the most difficult case treated thus far. This spectrum shows a cut-off at the 65th harmonic (3.17 Up + Ip) and an extended plateau containing low-intensity harmonics up to the 181st. The ionization rate is 1.7 x 1013 s-1 while at the end of the pulse 19.5% of the system is in the 1s ground state and 2.6% in the bound states up to n = 20, l = 19.	en
heal.journalName	Journal of Physics B: Atomic, Molecular and Optical Physics	en
dc.identifier.doi	10.1088/0953-4075/29/20/028	en
dc.identifier.volume	29	en
dc.identifier.issue	20	en
dc.identifier.spage	4787	en
dc.identifier.epage	4794	en