Strong laser-field effects in hydrogen: High-order above-threshold ionization and photoelectron angular distributions

Dionissopoulou, S; Mercouris, Th; Lyras, A; Nicolaides, CA

dc.contributor.author	Dionissopoulou, S	en
dc.contributor.author	Mercouris, Th	en
dc.contributor.author	Lyras, A	en
dc.contributor.author	Nicolaides, CA	en
dc.date.accessioned	2014-03-01T01:13:25Z
dc.date.available	2014-03-01T01:13:25Z
dc.date.issued	1997	en
dc.identifier.issn	1050-2947	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12460
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0012191877&partnerID=40&md5=a45530170f6be34f76a2f9be50eb9e8c	en
dc.subject.classification	Optics	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	MULTIPHOTON IONIZATION	en
dc.subject.other	ATOMIC-HYDROGEN	en
dc.subject.other	PULSES	en
dc.subject.other	COMPUTATION	en
dc.subject.other	PLATEAU	en
dc.title	Strong laser-field effects in hydrogen: High-order above-threshold ionization and photoelectron angular distributions	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	The problem of the interaction of the hydrogen atom with a: strong laser pulse has been tackled by solving the time-dependent Schrodinger equation via the state-specific expansion approach [Th. Mercouris et al., Phys. Rev. A 50, 4109 (1994)]. We present above-threshold ionization (ATI) spectra and study the frequency ((h) over bar omega(laser)=2-4 eV) and intensity (I-0 less than or equal to 2x10(14) W cm(-2)) dependence of the plateaulike structure appearing at high photoelectron energies. Our findings are qualitatively consistent with experimental data recently obtained in rare gases and render support to the proposed tunneling-rescattering mechanism for the interpretation of the observed features. Additional information on the dynamics of the laser-atom interaction is obtained by studying the frequency and intensity dependence of the photoelectron angular distributions (PADs). In agreement with recent experimental discoveries in rare gases, an appreciable sidelobe structure is found in PADs corresponding to high-order ATI peaks, for low laser frequencies ((h) over bar omega(laser) less than or equal to 3 eV). The connection of the sidelobe structure in the PADs to the ATI plateau is explored and evidence for a common underlying mechanism is produced. Our results suggest that the electron tunneling-rescattering mechanism is not the only one contributing to the appearance of the sidelobe structure in the PADs and the formation of the ATI plateau.	en
heal.publisher	AMERICAN PHYSICAL SOC	en
heal.journalName	Physical Review A - Atomic, Molecular, and Optical Physics	en
dc.identifier.isi	ISI:A1997XE37200059	en
dc.identifier.volume	55	en
dc.identifier.issue	6	en
dc.identifier.spage	4397	en
dc.identifier.epage	4406	en