Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields

In this work, we study the main features of the photoelectrons generated when noble gas atoms are driven by spatially bounded inhomogeneous strong laser fields. These spatial inhomogeneous oscillating fields, employed to ionize and accelerate the electrons, result from the interaction between a puls...

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Autores principales: Rueda Suescun, Pedro Enrique, Videla, Fabián Alfredo, Neyra, Enrique Gustavo, Pérez Hernández, José Antonio, Ciappina, Marcelo F., Torchia, Gustavo Adrián
Formato: Articulo
Lenguaje:Inglés
Publicado: 2020
Materias:
Física
Above-threshold ionization
Plasmonics
Utrafast optics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/145966
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-145966
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Above-threshold ionization
Plasmonics
Utrafast optics
spellingShingle Física
Above-threshold ionization
Plasmonics
Utrafast optics
Rueda Suescun, Pedro Enrique
Videla, Fabián Alfredo
Neyra, Enrique Gustavo
Pérez Hernández, José Antonio
Ciappina, Marcelo F.
Torchia, Gustavo Adrián
Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
topic_facet Física
Above-threshold ionization
Plasmonics
Utrafast optics
description In this work, we study the main features of the photoelectrons generated when noble gas atoms are driven by spatially bounded inhomogeneous strong laser fields. These spatial inhomogeneous oscillating fields, employed to ionize and accelerate the electrons, result from the interaction between a pulsed low intensity laser and bow-tie shaped gold nanostructures. Under this excitation scheme, energy-resolved above-threshold ionization (ATI) photoelectron spectra have been simulated by solving the one-dimensional (1D) time-dependent Schrödinger equation (TDSE) within the single active electron (SAE) approximation. These quantum mechanical results are supported by their classical counterparts, obtained by the numerical integration of the Newton–Lorentz equation. By using near-infrared wavelengths (0.8–3 μm) sources, our results show that very high energetic electrons (with kinetic energies in the keV domain) can be generated, far exceeding the limits obtained by using conventional, spatially homogeneous fields. This new characteristic can be supported considering the non-recombining electrons trajectories, already reported by Neyra and coworkers (Neyra E, et al 2018 J. Opt. 20, 034002). In order to build a real representation of the spatial dependence of the plasmonic-enhanced field in an analytic function, we fit the generated ’actual’ field using two Gaussian functions. We have further analyzed and explored this plasmonicmodified ATI phenomenon in a model argon atom by using several driven wavelengths at intensities in the order of 1014 W cm−2 . Throughout our contribution we carefully scrutinize the differences between the ATI obtained using spatially homogeneous and inhomogeneous laser fields. We present the various physical origins, or correspondingly distinct physical mechanisms, for the ATI generation driven by spatially bounded inhomogeneous fields.
format Articulo
Articulo
author Rueda Suescun, Pedro Enrique
Videla, Fabián Alfredo
Neyra, Enrique Gustavo
Pérez Hernández, José Antonio
Ciappina, Marcelo F.
Torchia, Gustavo Adrián
author_facet Rueda Suescun, Pedro Enrique
Videla, Fabián Alfredo
Neyra, Enrique Gustavo
Pérez Hernández, José Antonio
Ciappina, Marcelo F.
Torchia, Gustavo Adrián
author_sort Rueda Suescun, Pedro Enrique
title Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
title_short Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
title_full Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
title_fullStr Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
title_full_unstemmed Above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
title_sort above-threshold ionization driven by few-cycle spatially bounded inhomogeneous laser fields
publishDate 2020
url http://sedici.unlp.edu.ar/handle/10915/145966
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AT perezhernandezjoseantonio abovethresholdionizationdrivenbyfewcyclespatiallyboundedinhomogeneouslaserfields
AT ciappinamarcelof abovethresholdionizationdrivenbyfewcyclespatiallyboundedinhomogeneouslaserfields
AT torchiagustavoadrian abovethresholdionizationdrivenbyfewcyclespatiallyboundedinhomogeneouslaserfields
bdutipo_str Repositorios
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