High-order harmonic generation via bound-bound transitions in an elliptically polarized laser field

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5 Citazioni (Scopus)

Abstract

We use a simplified five-level system to investigate the high-order harmonic generation (HHG) spectrum emitted by an atom driven by a linearly or elliptically polarized laser field. For this model, the Schrödinger equation is exactly analytically reduced to the system of ordinary differential equations, which is solved numerically. Studying the intensity and polarization of the emitted radiation, we find that under high laser ellipticity the harmonic emission is suppressed. However, the harmonic intensity typically depends nonmonotonously on the laser ellipticity. Such anomalous behavior is very pronounced for the resonant harmonic. We offer an explanation of this behavior based on the increasing number of levels effectively involved in resonant HHG when the field ellipticity becomes nonzero. Finally, we find that the ellipticity of the resonant harmonic is, in general, higher than that of the other harmonics.
Lingua originaleEnglish
pagine (da-a)2673-2681
Numero di pagine9
RivistaJOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS
Volume34
Stato di pubblicazionePublished - 2016

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ellipticity
harmonic generations
harmonics
lasers
differential equations
polarization
radiation
atoms

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

Cita questo

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title = "High-order harmonic generation via bound-bound transitions in an elliptically polarized laser field",
abstract = "We use a simplified five-level system to investigate the high-order harmonic generation (HHG) spectrum emitted by an atom driven by a linearly or elliptically polarized laser field. For this model, the Schr{\"o}dinger equation is exactly analytically reduced to the system of ordinary differential equations, which is solved numerically. Studying the intensity and polarization of the emitted radiation, we find that under high laser ellipticity the harmonic emission is suppressed. However, the harmonic intensity typically depends nonmonotonously on the laser ellipticity. Such anomalous behavior is very pronounced for the resonant harmonic. We offer an explanation of this behavior based on the increasing number of levels effectively involved in resonant HHG when the field ellipticity becomes nonzero. Finally, we find that the ellipticity of the resonant harmonic is, in general, higher than that of the other harmonics.",
author = "Rosalba Daniele and Francesca Morales and Emilio Fiordilino and Giuseppe Castiglia and Corso, {Pietro Paolo} and Strelkov",
year = "2016",
language = "English",
volume = "34",
pages = "2673--2681",
journal = "Journal of the Optical Society of America B: Optical Physics",
issn = "0740-3224",
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TY - JOUR

T1 - High-order harmonic generation via bound-bound transitions in an elliptically polarized laser field

AU - Daniele, Rosalba

AU - Morales, Francesca

AU - Fiordilino, Emilio

AU - Castiglia, Giuseppe

AU - Corso, Pietro Paolo

AU - Strelkov, null

PY - 2016

Y1 - 2016

N2 - We use a simplified five-level system to investigate the high-order harmonic generation (HHG) spectrum emitted by an atom driven by a linearly or elliptically polarized laser field. For this model, the Schrödinger equation is exactly analytically reduced to the system of ordinary differential equations, which is solved numerically. Studying the intensity and polarization of the emitted radiation, we find that under high laser ellipticity the harmonic emission is suppressed. However, the harmonic intensity typically depends nonmonotonously on the laser ellipticity. Such anomalous behavior is very pronounced for the resonant harmonic. We offer an explanation of this behavior based on the increasing number of levels effectively involved in resonant HHG when the field ellipticity becomes nonzero. Finally, we find that the ellipticity of the resonant harmonic is, in general, higher than that of the other harmonics.

AB - We use a simplified five-level system to investigate the high-order harmonic generation (HHG) spectrum emitted by an atom driven by a linearly or elliptically polarized laser field. For this model, the Schrödinger equation is exactly analytically reduced to the system of ordinary differential equations, which is solved numerically. Studying the intensity and polarization of the emitted radiation, we find that under high laser ellipticity the harmonic emission is suppressed. However, the harmonic intensity typically depends nonmonotonously on the laser ellipticity. Such anomalous behavior is very pronounced for the resonant harmonic. We offer an explanation of this behavior based on the increasing number of levels effectively involved in resonant HHG when the field ellipticity becomes nonzero. Finally, we find that the ellipticity of the resonant harmonic is, in general, higher than that of the other harmonics.

UR - http://hdl.handle.net/10447/221234

UR - https://www.osapublishing.org/josab/abstract.cfm?uri=josab-34-1-18∨igin=search

M3 - Article

VL - 34

SP - 2673

EP - 2681

JO - Journal of the Optical Society of America B: Optical Physics

JF - Journal of the Optical Society of America B: Optical Physics

SN - 0740-3224

ER -