Above-threshold ionization by few-cycle spatially inhomogeneous fields

M. F. Ciappina; J. A. Pérez-Hernández; T. Shaaran; J. Biegert; R. Quidant; M. Lewenstein

doi:10.1103/PhysRevA.86.023413

Above-threshold ionization by few-cycle spatially inhomogeneous fields

M. F. Ciappina^*, J. A. Pérez-Hernández, T. Shaaran, J. Biegert, R. Quidant, M. Lewenstein

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

41 Scopus citations

Abstract

We present theoretical studies of above-threshold ionization (ATI) produced by spatially inhomogeneous fields. This kind of field appears as a result of the illumination of plasmonic nanostructures and metal nanoparticles with a short laser pulse. We use the time-dependent Schrödinger equation in reduced dimensions to understand and characterize the ATI features in these fields. It is demonstrated that the inhomogeneity of the enhanced plasmonic field plays an important role in the ATI process and it produces appreciable modifications to the energy-resolved photoelectron spectra. In fact, our numerical simulations reveal that high-energy electrons can be generated. Specifically, using a linear approximation for the spatial dependence of the enhanced plasmonic field and with a near-infrared laser with intensities in the mid 1014 W/cm2 range, we show it is possible to drive electrons with energies in the near-keV regime. Furthermore, we study how the carrier envelope phase influences the emission of ATI photoelectrons for few-cycle pulses. Our quantum mechanical calculations are supported by their classical counterparts.

Original language	English
Article number	023413
Journal	Physical Review A - Atomic, Molecular, and Optical Physics
Volume	86
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevA.86.023413
State	Published - 20 Aug 2012
Externally published	Yes

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title = "Above-threshold ionization by few-cycle spatially inhomogeneous fields",

abstract = "We present theoretical studies of above-threshold ionization (ATI) produced by spatially inhomogeneous fields. This kind of field appears as a result of the illumination of plasmonic nanostructures and metal nanoparticles with a short laser pulse. We use the time-dependent Schr{\"o}dinger equation in reduced dimensions to understand and characterize the ATI features in these fields. It is demonstrated that the inhomogeneity of the enhanced plasmonic field plays an important role in the ATI process and it produces appreciable modifications to the energy-resolved photoelectron spectra. In fact, our numerical simulations reveal that high-energy electrons can be generated. Specifically, using a linear approximation for the spatial dependence of the enhanced plasmonic field and with a near-infrared laser with intensities in the mid 1014 W/cm2 range, we show it is possible to drive electrons with energies in the near-keV regime. Furthermore, we study how the carrier envelope phase influences the emission of ATI photoelectrons for few-cycle pulses. Our quantum mechanical calculations are supported by their classical counterparts.",

author = "Ciappina, {M. F.} and P{\'e}rez-Hern{\'a}ndez, {J. A.} and T. Shaaran and J. Biegert and R. Quidant and M. Lewenstein",

year = "2012",

month = aug,

day = "20",

doi = "10.1103/PhysRevA.86.023413",

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T1 - Above-threshold ionization by few-cycle spatially inhomogeneous fields

AU - Ciappina, M. F.

AU - Pérez-Hernández, J. A.

AU - Shaaran, T.

AU - Biegert, J.

AU - Quidant, R.

AU - Lewenstein, M.

PY - 2012/8/20

Y1 - 2012/8/20

N2 - We present theoretical studies of above-threshold ionization (ATI) produced by spatially inhomogeneous fields. This kind of field appears as a result of the illumination of plasmonic nanostructures and metal nanoparticles with a short laser pulse. We use the time-dependent Schrödinger equation in reduced dimensions to understand and characterize the ATI features in these fields. It is demonstrated that the inhomogeneity of the enhanced plasmonic field plays an important role in the ATI process and it produces appreciable modifications to the energy-resolved photoelectron spectra. In fact, our numerical simulations reveal that high-energy electrons can be generated. Specifically, using a linear approximation for the spatial dependence of the enhanced plasmonic field and with a near-infrared laser with intensities in the mid 1014 W/cm2 range, we show it is possible to drive electrons with energies in the near-keV regime. Furthermore, we study how the carrier envelope phase influences the emission of ATI photoelectrons for few-cycle pulses. Our quantum mechanical calculations are supported by their classical counterparts.

AB - We present theoretical studies of above-threshold ionization (ATI) produced by spatially inhomogeneous fields. This kind of field appears as a result of the illumination of plasmonic nanostructures and metal nanoparticles with a short laser pulse. We use the time-dependent Schrödinger equation in reduced dimensions to understand and characterize the ATI features in these fields. It is demonstrated that the inhomogeneity of the enhanced plasmonic field plays an important role in the ATI process and it produces appreciable modifications to the energy-resolved photoelectron spectra. In fact, our numerical simulations reveal that high-energy electrons can be generated. Specifically, using a linear approximation for the spatial dependence of the enhanced plasmonic field and with a near-infrared laser with intensities in the mid 1014 W/cm2 range, we show it is possible to drive electrons with energies in the near-keV regime. Furthermore, we study how the carrier envelope phase influences the emission of ATI photoelectrons for few-cycle pulses. Our quantum mechanical calculations are supported by their classical counterparts.

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VL - 86

JO - Physical Review A - Atomic, Molecular, and Optical Physics

JF - Physical Review A - Atomic, Molecular, and Optical Physics

IS - 2

M1 - 023413

ER -

Above-threshold ionization by few-cycle spatially inhomogeneous fields

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