Analyzing the transition rates of the ionization of atoms by strong fields of a CO2 laser including nonzero initial momenta

Ristić, V. M.; Miladinović, T. B.; Radulović, M. M.

doi:10.1134/s1054660x08100125

Cited by 10 publications

(25 citation statements)

References 5 publications

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“…4 there also can be seen both maxima in 2D graphic, only now we fixed field intensity at 1.1 × 10 14 W/cm 2 . Just as in the case of linearly polarized field [8], transition rate decreases as value of momentum increases, see Fig. 4.…”

Section: Estimating the Transition Probability For Circularly Polarizmentioning

confidence: 95%

“…In order to perform necessary calculations, we needed an expression for momentum, which we obtained in paper [8] led by results of paper [10,11]. There, the expression for momentum was given by…”

Section: Calculating Non-zero Initial Momentummentioning

confidence: 99%

“…In recent years, there have been papers that dealt with non-zero momentum of ejected electrons [6][7][8]. Formula for transition rate in this case (for linearly polarized laser field) has the following form [4]:…”

Section: Introductionmentioning

confidence: 99%

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Calculating Ionization Transition Rate for Circularly Polarized Fields, Including Non-Zero Initial Momentum

2009

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Section: Estimating the Transition Probability For Circularly Polarizmentioning

confidence: 95%

Section: Calculating Non-zero Initial Momentummentioning

confidence: 99%

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Calculating Ionization Transition Rate for Circularly Polarized Fields, Including Non-Zero Initial Momentum

2009

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“…Among theories using this model the ADK-theory [1] is widely recognized. This theory was developed for linearly polarized laser fields, but it can be extended to the circularly polarized lasers, also [2,3,9].…”

Section: Introductionmentioning

confidence: 99%

“…It is definitely shown [1][2][3][4][5][6][7][8][9][10] that for low frequency laser fields one of the mostly used models is based on the tunneling regime: external field, due to its long duration, leads to the formation of the barrier through which electron can tunnel out. Among theories using this model the ADK-theory [1] is widely recognized.…”

Section: Introductionmentioning

confidence: 99%

Circularly Polarized Laser Fields, with Different Z, Including Non-Zero Initial Momentum

2011

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In this paper, by estimating the influence of different atom charge Z to the transition rate in tunnel ionization of atoms in strong laser fields we are devoloping further the observations from our earlier work. That is in the process of tunnel ionization including non-zero momentum into calculation of the transition rate gives result in lower transition rates for ejecting electrons from atoms by low-frequency laser fields, indicating that much of the photons are engaged in transferring energy to the free electron and thus unable to contribute to the effect of ionization. This is a conclusion that needs further experimental testing, which would clarify the mechanisms of tunnel ionization.

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Transition rate dependence on the improved turning point in ADK-theory

Ristić¹,

Stevanović²,

Radulović³

2006

Laser Phys. Lett.

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Estimation of transition rate of ionization of atoms for short range potential, based on assumptions of Keldysh approximation, shows that short-range potential does not affect the energy of the final state of ejected electron, when it leaves the atom. Coulomb potential is then treated as perturbation of final state energy leading to the ADK-theory. But Coulomb interaction was not originally included in calculating the turning point. This we corrected in [1], though only for fields with intensities below those of the atomic field. But as the ADK-theory was recently extended to the case of superstrong fields, our calculations now include extension of potential range up to 1017 W/cm2; this leads to the shift of position of the turning point τ, which then influences transition rates for atoms in the low-frequency electromagnetic field of superstrong lasers. On Figs. 1 and 2 obtained from our calculations the value of Z was switched from 1 to 10 at field intensity of 5 × 1013 W/cm2 (atomic unit system), which is done for the first time ever. The second figure also indicates an enormous activity at fields 1013 W/cm2, which is due to strong tunneling effect for this energies of laser field. After that, there is saturation at a very low level of transition rate for fields from 1015 W/cm2 to 1017 W/cm2.

show abstract

Analyzing the transition rates of the ionization of atoms by strong fields of a CO2 laser including nonzero initial momenta

Cited by 10 publications

References 5 publications

Calculating Ionization Transition Rate for Circularly Polarized Fields, Including Non-Zero Initial Momentum

Calculating Ionization Transition Rate for Circularly Polarized Fields, Including Non-Zero Initial Momentum

Circularly Polarized Laser Fields, with Different Z, Including Non-Zero Initial Momentum

Transition rate dependence on the improved turning point in ADK-theory

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