Variation of harmonic generation from He interacting with short laser pulses of 5 eV as a function of pulse rise time and intensity

Dionissopoulou, S; Mercouris, T; Nicolaides, CA

dc.contributor.author	Dionissopoulou, S	en
dc.contributor.author	Mercouris, T	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:50:35Z
dc.date.available	2014-03-01T01:50:35Z
dc.date.issued	2000	en
dc.identifier.issn	1050-2947	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/26052
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	RARE-GASES	en
dc.subject.other	ELECTRON CORRELATION	en
dc.subject.other	HELIUM	en
dc.subject.other	IONS	en
dc.subject.other	SPECTRA	en
dc.subject.other	FIELDS	en
dc.subject.other	CM(-2)	en
dc.subject.other	STATES	en
dc.subject.other	ATOMS	en
dc.subject.other	KRF	en
dc.title	Variation of harmonic generation from He interacting with short laser pulses of 5 eV as a function of pulse rise time and intensity	en
heal.type	journalArticle	en
heal.identifier.secondary	063402	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	We have applied the state-specific expansion approach (SSEA) to the solution of the time-dependent Schrodinger equation describing the interaction of He with laser pulses of (h) over bar omega = 5 eV, which have a shape with a sharp rise and peak intensities in the range 5 x 10(14)-3.46 x 10(15) W/cm(2). The calculations include the effects of the state-specific self-consistent field, the electron correlation, and the n = 2 intrashell doubly excited states. The results show that, provided the pulses have fast rise times, neutral He can generate harmonics of higher order than previously thought before the He+ contribution takes over. The computed spectra agree with the observations of Sarukura et al. [Phys. Rev. A 43, 1669 (1991)]. In particular, the SSEA results reveal "anomalously" high peaks for the 13th and 21st harmonics, in agreement with experiment.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	PHYSICAL REVIEW A	en
dc.identifier.isi	ISI:000087567900061	en
dc.identifier.volume	6106	en
dc.identifier.issue	6	en