Stark control of multiphoton ionization through Freeman resonances in alkyl iodides

Multiphoton ionization (MPI) of alkyl iodides (RI, R = CnH2n+1, n = 1–4) has been investigated with femtosecond laser pulses centered at 800 and 400 nm along with photoelectron imaging detection. In addition, the ultraviolet (UV)–vacuum ultraviolet (VUV) absorption spectra of gas-phase RIs have been...

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Autores: Casasús, Ignacio M., Corrales Castellanos, María Eugenia, Murillo-Sánchez, Marta L., Marggi Poullain, Sonia, Oliveira, Nelson de, Limão-Vieira, Paulo, Bañares, Luis
Tipo de recurso: artículo
Fecha de publicación:2023
País:España
Institución:Universidad Autónoma de Madrid
Repositorio:Biblos-e Archivo. Repositorio Institucional de la UAM
Idioma:inglés
OAI Identifier:oai:repositorio.uam.es:10486/710467
Acceso en línea:http://hdl.handle.net/10486/710467
https://dx.doi.org/10.1063/5.0161628
Access Level:acceso abierto
Palabra clave:Photoelectron imaging
Photoionization,
Stark effect
Rydberg states
Física
Química
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spelling Stark control of multiphoton ionization through Freeman resonances in alkyl iodidesCasasús, Ignacio M.Corrales Castellanos, María EugeniaMurillo-Sánchez, Marta L.Marggi Poullain, SoniaOliveira, Nelson deLimão-Vieira, PauloBañares, LuisPhotoelectron imagingPhotoionization,Stark effectRydberg statesFísicaQuímicaMultiphoton ionization (MPI) of alkyl iodides (RI, R = CnH2n+1, n = 1–4) has been investigated with femtosecond laser pulses centered at 800 and 400 nm along with photoelectron imaging detection. In addition, the ultraviolet (UV)–vacuum ultraviolet (VUV) absorption spectra of gas-phase RIs have been measured in the photon energy range of 5–11 eV using the VUV Fourier transform spectrometer at the VUV DESIRS beamline of the synchrotron SOLEIL facility. The use of high-laser-field strengths in matter–radiation interaction generates highly non-linear phenomena, such as the Stark shift effect, which distorts the potential energy surfaces of molecules by varying both the energy of electronic and rovibrational states and their ionization energies. The Stark shift can then generate resonances between intermediate states and an integer number of laser photons of a given wavelength, which are commonly known as Freeman resonances. Here, we study how the molecular structure of linear and branched alkyl iodides affects the UV–VUV absorption spectrum, the MPI process, and the generation of Freeman resonances. The obtained results reveal a dominant resonance in the experiments at 800 nm, which counter-intuitively appears at the same photoelectron kinetic energy in the whole alkyl iodide series. The ionization pathways of this resonance strongly involve the 6p( 2 E3/2) Rydberg state with different degrees of vibrational excitation, revealing an energy compensation effect as the R-chain complexity increasesThe financial support from the Spanish Ministry of Science and Innovation under Grant Nos. PGC2018-096444-B-I00 and PID2021-122839NB-I00 and the Madrid Regional Government through the program Proyectos Sinérgicos de I+D (Grant No. Y2018/NMT-5028 FULMATEN-CM) is gratefully acknowledged. This work was supported in part by the Madrid Government (Comunidad de Madrid, Spain) under the Multi-annual Agreement with Universidad Complutense de Madrid in the line Research Incentive for Young Ph.D.s, in the context of the V PRICIT (Regional Program of Research and Technological Innovation) (Grant No. PR27/21-010). P.L.-V. acknowledges Fundación Carolina for a mobility grant at Complutense University of Madrid under the Programa de Movilidad de Profesores e Investigadores Portugueses (Fundación Endesa). Part of the experiments presented here was performed at the DESIRS beamline at synchrotron SOLEIL under Proposal No. 20170473. We acknowledge SOLEIL for the provision of synchrotron radiation facilities. We are grateful for the facilities provided by the Center for Ultrafast Lasers of Universidad Complutense de Madrid.American Institute of PhysicsDepartamento de Física AplicadaDepartamento de QuímicaFacultad de Ciencias20232023-08-15research articlehttp://purl.org/coar/resource_type/c_2df8fbb1VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10486/710467https://dx.doi.org/10.1063/5.0161628reponame:Biblos-e Archivo. Repositorio Institucional de la UAMinstname:Universidad Autónoma de MadridInglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:repositorio.uam.es:10486/7104672026-06-23T12:46:27Z
dc.title.none.fl_str_mv Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
title Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
spellingShingle Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
Casasús, Ignacio M.
Photoelectron imaging
Photoionization,
Stark effect
Rydberg states
Física
Química
title_short Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
title_full Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
title_fullStr Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
title_full_unstemmed Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
title_sort Stark control of multiphoton ionization through Freeman resonances in alkyl iodides
dc.creator.none.fl_str_mv Casasús, Ignacio M.
Corrales Castellanos, María Eugenia
Murillo-Sánchez, Marta L.
Marggi Poullain, Sonia
Oliveira, Nelson de
Limão-Vieira, Paulo
Bañares, Luis
author Casasús, Ignacio M.
author_facet Casasús, Ignacio M.
Corrales Castellanos, María Eugenia
Murillo-Sánchez, Marta L.
Marggi Poullain, Sonia
Oliveira, Nelson de
Limão-Vieira, Paulo
Bañares, Luis
author_role author
author2 Corrales Castellanos, María Eugenia
Murillo-Sánchez, Marta L.
Marggi Poullain, Sonia
Oliveira, Nelson de
Limão-Vieira, Paulo
Bañares, Luis
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Departamento de Física Aplicada
Departamento de Química
Facultad de Ciencias
dc.subject.none.fl_str_mv Photoelectron imaging
Photoionization,
Stark effect
Rydberg states
Física
Química
topic Photoelectron imaging
Photoionization,
Stark effect
Rydberg states
Física
Química
description Multiphoton ionization (MPI) of alkyl iodides (RI, R = CnH2n+1, n = 1–4) has been investigated with femtosecond laser pulses centered at 800 and 400 nm along with photoelectron imaging detection. In addition, the ultraviolet (UV)–vacuum ultraviolet (VUV) absorption spectra of gas-phase RIs have been measured in the photon energy range of 5–11 eV using the VUV Fourier transform spectrometer at the VUV DESIRS beamline of the synchrotron SOLEIL facility. The use of high-laser-field strengths in matter–radiation interaction generates highly non-linear phenomena, such as the Stark shift effect, which distorts the potential energy surfaces of molecules by varying both the energy of electronic and rovibrational states and their ionization energies. The Stark shift can then generate resonances between intermediate states and an integer number of laser photons of a given wavelength, which are commonly known as Freeman resonances. Here, we study how the molecular structure of linear and branched alkyl iodides affects the UV–VUV absorption spectrum, the MPI process, and the generation of Freeman resonances. The obtained results reveal a dominant resonance in the experiments at 800 nm, which counter-intuitively appears at the same photoelectron kinetic energy in the whole alkyl iodide series. The ionization pathways of this resonance strongly involve the 6p( 2 E3/2) Rydberg state with different degrees of vibrational excitation, revealing an energy compensation effect as the R-chain complexity increases
publishDate 2023
dc.date.none.fl_str_mv 2023
2023-08-15
dc.type.none.fl_str_mv research article
http://purl.org/coar/resource_type/c_2df8fbb1
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10486/710467
https://dx.doi.org/10.1063/5.0161628
url http://hdl.handle.net/10486/710467
https://dx.doi.org/10.1063/5.0161628
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Institute of Physics
publisher.none.fl_str_mv American Institute of Physics
dc.source.none.fl_str_mv reponame:Biblos-e Archivo. Repositorio Institucional de la UAM
instname:Universidad Autónoma de Madrid
instname_str Universidad Autónoma de Madrid
reponame_str Biblos-e Archivo. Repositorio Institucional de la UAM
collection Biblos-e Archivo. Repositorio Institucional de la UAM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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