Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses
ABSTRACT: A time-dependent Feshbach formalism is proposed to study the resonant photoionization of the helium atom using ultrashort laser pulses. This spectral method consist in solving the time-dependent Schr¨odinger equation by expanding the time-dependent wavepacket in terms of eigenfunctions def...
- Autores:
-
Granados Castro, Carlos Mario
Sanz Vicario, José Luis
- Tipo de recurso:
- Article of investigation
- Fecha de publicación:
- 2014
- Institución:
- Universidad de Antioquia
- Repositorio:
- Repositorio UdeA
- Idioma:
- eng
- OAI Identifier:
- oai:bibliotecadigital.udea.edu.co:10495/9326
- Acceso en línea:
- http://hdl.handle.net/10495/9326
- Palabra clave:
- Método de Feshbach
Fotoionización
Lásers
Lasers
- Rights
- openAccess
- License
- Atribución-NoComercial-SinDerivadas 2.5 Colombia
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|
dc.title.spa.fl_str_mv |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
title |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
spellingShingle |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses Método de Feshbach Fotoionización Lásers Lasers |
title_short |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
title_full |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
title_fullStr |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
title_full_unstemmed |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
title_sort |
Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses |
dc.creator.fl_str_mv |
Granados Castro, Carlos Mario Sanz Vicario, José Luis |
dc.contributor.author.none.fl_str_mv |
Granados Castro, Carlos Mario Sanz Vicario, José Luis |
dc.subject.none.fl_str_mv |
Método de Feshbach Fotoionización Lásers Lasers |
topic |
Método de Feshbach Fotoionización Lásers Lasers |
description |
ABSTRACT: A time-dependent Feshbach formalism is proposed to study the resonant photoionization of the helium atom using ultrashort laser pulses. This spectral method consist in solving the time-dependent Schr¨odinger equation by expanding the time-dependent wavepacket in terms of eigenfunctions defined in two orthogonal halfspaces: a bound-like resonant Q and a non-resonant scattering-like P. The latter eigenfunctions for the projected Hamiltonians QHQ and PHP are not indeed eigenfunctions of the total Hamiltonian, so that the electrostatic coupling QHP acts as a leaking operator Q→P responsible for the temporal decay of resonances into the underlying continuum, keeping the physical insight of the Fano-Feshbach time independent formalisms. This method allows not only for accurate descriptions of the resonance parameters (energies, widths and Fano shape parameters) but also for the temporal evolution of the photodynamics involved in the resonant photoionization when using short laser pulses. We illustrate the performance of the method by analyzing the temporal formation of i) the one-photon ionization cross section below the second ionization threshold and the buildup of Fano profiles and ii) the up-down asymmetry of photoelectron angular distributions resulting from interferences of S-, P- and D-waves after simultaneous photoexcitation and decay of the lowest 1Se, 1Po and 1De resonant states, by using two sequential laser pulses with XUV harmonic frequencies separated by a time delay. |
publishDate |
2014 |
dc.date.issued.none.fl_str_mv |
2014 |
dc.date.accessioned.none.fl_str_mv |
2018-04-05T19:27:31Z |
dc.date.available.none.fl_str_mv |
2018-04-05T19:27:31Z |
dc.type.spa.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.coarversion.fl_str_mv |
http://purl.org/coar/version/c_970fb48d4fbd8a85 http://purl.org/coar/version/c_71e4c1898caa6e32 |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_2df8fbb1 |
dc.type.redcol.spa.fl_str_mv |
https://purl.org/redcol/resource_type/ART |
dc.type.local.spa.fl_str_mv |
Artículo de investigación |
format |
http://purl.org/coar/resource_type/c_2df8fbb1 |
dc.identifier.citation.spa.fl_str_mv |
Granados Castro, C. M., & Sanz Vicario, J. L. (2014). Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses. Journal of Physics: Conference Series. 488(012018), 1-6. DOI:10.1088/1742-6596/488/1/012018 |
dc.identifier.issn.none.fl_str_mv |
1742-6596 |
dc.identifier.uri.none.fl_str_mv |
http://hdl.handle.net/10495/9326 |
dc.identifier.doi.none.fl_str_mv |
10.1088/1742-6596/488/1/012018 |
dc.identifier.eissn.none.fl_str_mv |
1742-6588 |
identifier_str_mv |
Granados Castro, C. M., & Sanz Vicario, J. L. (2014). Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses. Journal of Physics: Conference Series. 488(012018), 1-6. DOI:10.1088/1742-6596/488/1/012018 1742-6596 10.1088/1742-6596/488/1/012018 1742-6588 |
url |
http://hdl.handle.net/10495/9326 |
dc.language.iso.spa.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartofjournalabbrev.spa.fl_str_mv |
J. Phys.:Conf.Ser |
dc.rights.*.fl_str_mv |
Atribución-NoComercial-SinDerivadas 2.5 Colombia |
dc.rights.spa.fl_str_mv |
info:eu-repo/semantics/openAccess |
dc.rights.uri.*.fl_str_mv |
http://creativecommons.org/licenses/by-nc-nd/2.5/co/ |
dc.rights.accessrights.spa.fl_str_mv |
http://purl.org/coar/access_right/c_abf2 |
dc.rights.creativecommons.spa.fl_str_mv |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
rights_invalid_str_mv |
Atribución-NoComercial-SinDerivadas 2.5 Colombia http://creativecommons.org/licenses/by-nc-nd/2.5/co/ http://purl.org/coar/access_right/c_abf2 https://creativecommons.org/licenses/by-nc-nd/4.0/ |
eu_rights_str_mv |
openAccess |
dc.format.mimetype.spa.fl_str_mv |
application/pdf |
dc.publisher.spa.fl_str_mv |
Institute of Physics Publishing (IOP) |
dc.publisher.group.spa.fl_str_mv |
Grupo de Física Atómica y Molecular |
dc.publisher.place.spa.fl_str_mv |
Reino Unido |
institution |
Universidad de Antioquia |
bitstream.url.fl_str_mv |
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spelling |
Granados Castro, Carlos MarioSanz Vicario, José Luis2018-04-05T19:27:31Z2018-04-05T19:27:31Z2014Granados Castro, C. M., & Sanz Vicario, J. L. (2014). Time-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulses. Journal of Physics: Conference Series. 488(012018), 1-6. DOI:10.1088/1742-6596/488/1/0120181742-6596http://hdl.handle.net/10495/932610.1088/1742-6596/488/1/0120181742-6588ABSTRACT: A time-dependent Feshbach formalism is proposed to study the resonant photoionization of the helium atom using ultrashort laser pulses. This spectral method consist in solving the time-dependent Schr¨odinger equation by expanding the time-dependent wavepacket in terms of eigenfunctions defined in two orthogonal halfspaces: a bound-like resonant Q and a non-resonant scattering-like P. The latter eigenfunctions for the projected Hamiltonians QHQ and PHP are not indeed eigenfunctions of the total Hamiltonian, so that the electrostatic coupling QHP acts as a leaking operator Q→P responsible for the temporal decay of resonances into the underlying continuum, keeping the physical insight of the Fano-Feshbach time independent formalisms. This method allows not only for accurate descriptions of the resonance parameters (energies, widths and Fano shape parameters) but also for the temporal evolution of the photodynamics involved in the resonant photoionization when using short laser pulses. We illustrate the performance of the method by analyzing the temporal formation of i) the one-photon ionization cross section below the second ionization threshold and the buildup of Fano profiles and ii) the up-down asymmetry of photoelectron angular distributions resulting from interferences of S-, P- and D-waves after simultaneous photoexcitation and decay of the lowest 1Se, 1Po and 1De resonant states, by using two sequential laser pulses with XUV harmonic frequencies separated by a time delay.application/pdfengInstitute of Physics Publishing (IOP)Grupo de Física Atómica y MolecularReino Unidoinfo:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_2df8fbb1https://purl.org/redcol/resource_type/ARTArtículo de investigaciónhttp://purl.org/coar/version/c_970fb48d4fbd8a85http://purl.org/coar/version/c_71e4c1898caa6e32Atribución-NoComercial-SinDerivadas 2.5 Colombiainfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-nd/2.5/co/http://purl.org/coar/access_right/c_abf2https://creativecommons.org/licenses/by-nc-nd/4.0/Método de FeshbachFotoionizaciónLásersLasersTime-dependent Feshbach method to study resonant photoionization of He with ultrashort laser pulsesJ. Phys.:Conf.SerJournal of Physics: Conference Series1648812018CC-LICENSElicense_urllicense_urlArtículo de investigacióntext/plain; charset=utf-849http://bibliotecadigital.udea.edu.co/bitstream/10495/9326/2/license_url4afdbb8c545fd630ea7db775da747b2fMD52license_textlicense_texttext/html; charset=utf-80http://bibliotecadigital.udea.edu.co/bitstream/10495/9326/3/license_textd41d8cd98f00b204e9800998ecf8427eMD53license_rdflicense_rdfLicenciaapplication/rdf+xml; charset=utf-80http://bibliotecadigital.udea.edu.co/bitstream/10495/9326/4/license_rdfd41d8cd98f00b204e9800998ecf8427eMD54LICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://bibliotecadigital.udea.edu.co/bitstream/10495/9326/5/license.txt8a4605be74aa9ea9d79846c1fba20a33MD55ORIGINALSanzJose_2014_TimeDependentFeshbach.pdfSanzJose_2014_TimeDependentFeshbach.pdfArtículo de investigaciónapplication/pdf860632http://bibliotecadigital.udea.edu.co/bitstream/10495/9326/1/SanzJose_2014_TimeDependentFeshbach.pdf34c8119203a4e669f3fd6dad052bfe80MD5110495/9326oai:bibliotecadigital.udea.edu.co:10495/93262021-05-16 11:44:07.579Repositorio Institucional Universidad de Antioquiaandres.perez@udea.edu.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 |