Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme

High harmonic generation (HHG) provides a flexible framework for the development of coherent light sources in the extreme-ultraviolet and soft X-ray regimes. However it suffers from low conversion efficiencies as the control of the HHG spectral and temporal characteristics requires manipulating elec...

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Autores: Castro, Alberto, Rubio, Angel, Gross, E. K. U.
Tipo de recurso: artículo
Estado:Versión enviada para evaluación y publicación
Fecha de publicación:2015
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/136429
Acceso en línea:http://hdl.handle.net/10261/136429
Access Level:acceso abierto
Palabra clave:ddc:530
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spelling Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional schemeCastro, AlbertoRubio, AngelGross, E. K. U.ddc:530High harmonic generation (HHG) provides a flexible framework for the development of coherent light sources in the extreme-ultraviolet and soft X-ray regimes. However it suffers from low conversion efficiencies as the control of the HHG spectral and temporal characteristics requires manipulating electron trajectories on attosecond time scale. The phase matching mechanism has been employed to selectively enhance specific quantum paths leading to HHG. A few important fundamental questions remain open, among those how much of the enhancement can be achieved by the single-emitter and what is the role of correlations (or the electronic structure) in the selectivity and control of HHG generation. Here we address those questions by examining computationally the possibility of optimizing the HHG spectrum of isolated hydrogen and helium atoms by shaping the slowly varying envelope of a 800 nm, 200-cycles long laser pulse. The spectra are computed with a fully quantum mechanical description, by explicitly computing the time-dependent dipole moment of the systems using a time-dependent density-functional approach (or the single-electron Schrödinger equation for the case of H), on top of a one-dimensional model. The sought optimization corresponds to the selective enhancement of single harmonics, which we find to be significant. This selectivity is entirely due to the single atom response, and not to any propagation or phase-matching effect. Moreover, we see that the electronic correlation plays a role in the determining the degree of optimization that can be obtained.This work was supported by the European Commission within the FP7 CRONOS project (Grant number 280879). A.R. acknowledges financial support from the European Research Council Advanced Grant DYNamo (ERC-2010- AdG-267374), Spanish Grant (FIS2013-46159-C3-1-P), Grupos Consolidados UPV/EHU del Gobierno Vasco (IT578-13), and COST Actions CM1204 (XLIC) and MP1306 (EUSpec). A.C. acknowledges support from the Spanish Grant FIS2013-46159-C2-2-P.Peer ReviewedSpringer NatureUniversidad del País VascoEusko JaurlaritzaMinisterio de Economía y Competitividad (España)European Research CouncilEuropean CommissionConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2016201620152016info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Preprintinfo:eu-repo/semantics/submittedVersionhttp://hdl.handle.net/10261/136429reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2013-46159-C2-2-Pinfo:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2013-46159-C3-1-Pinfo:eu-repo/grantAgreement/EC/FP7/280879info:eu-repo/grantAgreement/EC/FP7/267374https://doi.org/10.1140/epjb/e2015-50889-7Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/1364292026-05-22T06:33:51Z
dc.title.none.fl_str_mv Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
title Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
spellingShingle Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
Castro, Alberto
ddc:530
title_short Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
title_full Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
title_fullStr Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
title_full_unstemmed Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
title_sort Enhancing and controlling single-atom high-harmonic generation spectra: a time-dependent density-functional scheme
dc.creator.none.fl_str_mv Castro, Alberto
Rubio, Angel
Gross, E. K. U.
author Castro, Alberto
author_facet Castro, Alberto
Rubio, Angel
Gross, E. K. U.
author_role author
author2 Rubio, Angel
Gross, E. K. U.
author2_role author
author
dc.contributor.none.fl_str_mv Universidad del País Vasco
Eusko Jaurlaritza
Ministerio de Economía y Competitividad (España)
European Research Council
European Commission
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv ddc:530
topic ddc:530
description High harmonic generation (HHG) provides a flexible framework for the development of coherent light sources in the extreme-ultraviolet and soft X-ray regimes. However it suffers from low conversion efficiencies as the control of the HHG spectral and temporal characteristics requires manipulating electron trajectories on attosecond time scale. The phase matching mechanism has been employed to selectively enhance specific quantum paths leading to HHG. A few important fundamental questions remain open, among those how much of the enhancement can be achieved by the single-emitter and what is the role of correlations (or the electronic structure) in the selectivity and control of HHG generation. Here we address those questions by examining computationally the possibility of optimizing the HHG spectrum of isolated hydrogen and helium atoms by shaping the slowly varying envelope of a 800 nm, 200-cycles long laser pulse. The spectra are computed with a fully quantum mechanical description, by explicitly computing the time-dependent dipole moment of the systems using a time-dependent density-functional approach (or the single-electron Schrödinger equation for the case of H), on top of a one-dimensional model. The sought optimization corresponds to the selective enhancement of single harmonics, which we find to be significant. This selectivity is entirely due to the single atom response, and not to any propagation or phase-matching effect. Moreover, we see that the electronic correlation plays a role in the determining the degree of optimization that can be obtained.
publishDate 2015
dc.date.none.fl_str_mv 2015
2016
2016
2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
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info:eu-repo/semantics/submittedVersion
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dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/136429
url http://hdl.handle.net/10261/136429
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
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info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/FIS2013-46159-C3-1-P
info:eu-repo/grantAgreement/EC/FP7/280879
info:eu-repo/grantAgreement/EC/FP7/267374
https://doi.org/10.1140/epjb/e2015-50889-7
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer Nature
publisher.none.fl_str_mv Springer Nature
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
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