Partitioning of the Linear Photon Momentum in Multiphoton Ionization

Smeenk, C.; Arissian, Ladan; Zhou, Bing; Mysyrowicz, A.; Villeneuve, D. M.; Staudte, A.; Corkum, P. B.

doi:10.1103/physrevlett.106.193002

Cited by 180 publications

(232 citation statements)

References 32 publications

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“…The calculated intensity-dependent p z shares the similar shape as measured in Ref. [9]. When the intensity is larger than 3 × 10 13 W/cm 2 , α approaches to 1 and γ approaches to 0, however, the varying β results in the deviation of the linear relationship between p z and the laser intensity.…”

supporting

confidence: 50%

“…These laser parameters are similar to those used in Ref. [9,19], and the law p z ≈ Ep +0.3Ip c is reproduced, where E p is the expected kinetic energy of the photoelectron. The deviation of the exact result and approximated results is within the order of ∼ 1 c 2 , which is consistent with our analysis.…”

mentioning

confidence: 70%

“…Thanks to the detection technics with high resolutions developed recently, Smeenk et al [9] and Ludwig et al [10] reported that photoelectrons acquire the momentum shift along the direction of laser propagation (termed as longitudinal momentum shift in the rest of the letter) during tunneling ionization, and this photon momentum transfer is also reported in the time-dependent Dirac equation simulation [11], time-dependent Schrödinger equation (TDSE) simulations [12,13], classical trajectory Monte Carlo calculations [14]. Some characters of the longitudinal momentum shift [15][16][17][18][19][20] were explored by calculations of strong field approximation (SFA).…”

mentioning

confidence: 99%

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Strong Field Theories beyond Dipole Approximations in Nonrelativistic Regimes

Lao

2017

Phys. Rev. Lett.

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supporting

confidence: 50%

mentioning

confidence: 70%

mentioning

confidence: 99%

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Strong Field Theories beyond Dipole Approximations in Nonrelativistic Regimes

Lao

2017

Phys. Rev. Lett.

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“…The total energy absorbed during the ionization process N hν needs to be divided between ions (as recoil energy), electrons (drift energy) and light (Ponderomotive energy) [27]. Considering that the recoil energy to the ion has no polarization dependence, and the pondermotive energy is the same for linear and circularly polarized light of the same energy, the difference between the number of photons absorbed depends on the electron drift velocity, which depends strongly on the laser field.…”

mentioning

confidence: 99%

“…To the drift velocity acquired by the electron correspond a kinetic energy that has to be supplied by the laser field. The drift velocity of the electrons (charge e, mass m) ionized with circularly polarized light (field amplitude E 0 and angular frequency ω) is centered at eE 0 /(mω) [8,27], with a distribution that corresponds to quantum mechanical tunneling width [7]. For the intensity of 2.8 × 10…”

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confidence: 99%

Effect of Light Polarization on Plasma Distribution and Filament Formation

Arissian

Mirell

Yeak

et al. 2012

Springer Proceedings in Physics

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We show that, for 200 fs light pulses at 790 nm, the formation of filaments is strongly affected by the laser light polarization . Filamentation does not exist for a pure circularly polarized light, propagating in vacuum before focusing in air, while there is no difference for focusing the light in air or vacuum for linearly polarized light.PACS numbers: 42.65.Jx Beam trapping, self-focusing and defocusing; self-phase modulation, 42.25.Ja Polarization, 32.80.Fb Photoionization of atoms and ions For a laser beam of sufficient intensity, air itself is a nonlinear medium, having a complex intensity dependent index of refraction, nonlinear absorption, induced birefringence, and becoming a partially conductive medium. These properties lead to light filamentation, a situation where the nonlinear properties of air determine the propagation properties. While they have been investigated since their discovery in 1995 both in the IR [1] and the UV [2], their formation and nature are still the object of controversy [3,4].In strong field ionization the light polarization had been extensively investigated [5] and used to control recollision of the electron [6,7]. Recently [8] detailed measurements of current in argon and nitrogen at filament intensities showed a strong dependence on light polarization. Measurement presented here demonstrate the effect of light polarization in filament formation. This effect has not been clearly investigated previously, because of the difficulty in 1) ascertaining that the beam has the expected polarization at the point where filamentation starts [9] and 2) making polarization measurements of a high intensity filament. These difficulties relate to the fact that the filamentation study is not a chamber study like most of the strong field light-matter interactions. Although there had been evidence of polarization deformation of high intensity beam propagating in air [9], filaments are prepared over a long propagation distance in gases. In order to have a clear starting point and a well defined initial condition for the filament, we use an aerodynamic window to prepare the filament in vacuum before launching it in air. By focusing the beam in vacuum to the filament size, all pre-filament nonlinear effects are eliminated [10]. Given such initial condition no filament is generated with circularly polarized light prepared in vacuum, while filaments are observed with the same circularly polarized beam propagating in air in the pre-filamentation stage. For the linearly polarized light filaments persist in both cases of pre-propagation in air and vacuum, with filaments prepared in vacuum having 20 percent longer length.An infrared filament is an ideal object to study strong field light-matter interaction, in which light and matter have a mutual recordable effect on each other, resulting in a confinement of a laser beam in a few hundred micron diameter channel, over distance, in excess of the Rayleigh range for that beam size.For the few hundred fs long pulses intense enough to create a filament in air,...

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Nondipole Effects in Atomic Ionization Induced by an Intense Counter‐Rotating Bicircular Laser Field

et al. 2023

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Nondipole effects occurring in the process of atomic ionization by an intense, mid-infrared, counter-rotating bicircular laser field are investigated using the strong-field approximation with leading-order nondipole corrections. The time integrals appearing in the expression for the differential ionization rate are computed in two ways: numerically, and by applying the saddle-point approximation. The nondipole corrections introduce an asymmetry in the photoelectron momentum distribution along the field propagation direction. The asymmetry is quantified by the partial average value of the propagation-direction momentum component of the photoelectrons and by the normalized difference of the differential ionization rates computed including and excluding the nondipole corrections. Using the saddle-point approximation, it is investigated how the nondipole corrections change the solutions for direct photoelectrons and how this affects the momentum spectra. The impact of nondipole corrections increases with increasing photoelectron energy. Analysis of the complete photoelectron spectra including both direct and rescattered photoelectrons shows that, in the low-energy region, a shift against the propagation direction occurs. The partial average of the propagation-direction momentum component in the rescattering region exhibits a plateau structure and also a local minimum structure that was recently observed in an experiment with a linearly polarized laser field (Lin et al., Phys Rev. Lett. 128, 023201 (2022)).

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Partitioning of the Linear Photon Momentum in Multiphoton Ionization

Cited by 180 publications

References 32 publications

Strong Field Theories beyond Dipole Approximations in Nonrelativistic Regimes

Strong Field Theories beyond Dipole Approximations in Nonrelativistic Regimes

Effect of Light Polarization on Plasma Distribution and Filament Formation

Nondipole Effects in Atomic Ionization Induced by an Intense Counter‐Rotating Bicircular Laser Field

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