Enhanced transmission of laser light through thin slabs of overdense plasmas

Cairns, R. A.; Rau, B.; Airila, M.

doi:10.1063/1.1287827

Cited by 8 publications

(6 citation statements)

References 10 publications

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“…[10][11][12][13][14] Many interesting physical phenomena have been predicted and observed experimentally in laser-foil interactions. Among them are generation of a high-frequency radiation 13,15 and high harmonics of an incident field, 5,9 production of relativistic electrons 1,2,16 and ions, 14,16,17 generation of relativistic electron mirrors, 15,[18][19][20] shaping of laser pulses 5,21,22 and generation of ultrashort electromagnetic pulses, 23,24 and others.…”

Section: Introductionmentioning

confidence: 99%

Flying mirror model for interaction of a super-intense nonadiabatic laser pulse with a thin plasma layer: Dynamics of electrons in a linearly polarized external field

Kulagin¹,

Черепенин

Hur³

et al. 2007

Physics of Plasmas

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Interaction of a high-power laser pulse having a sharp front with a thin plasma layer is considered. General one-dimensional numerical-analytical model is elaborated, in which the plasma layer is represented as a large collection of electron sheets, and a radiation reaction force is derived analytically. Using this model, trajectories of the electrons of the plasma layer are calculated numerically and compared with the electron trajectories obtained in particle-in-cell simulations, and a good agreement is found. Two simplified analytical models are considered, in which only one electron sheet is used, and it moves transversely and longitudinally in the fields of an ion sheet and a laser pulse (longitudinal displacements along the laser beam axis can be considerably larger than the laser wavelength). In the model I, a radiation reaction is included self-consistently, while in the model II a radiation reaction force is omitted. For the two models, analytical solutions for the dynamical parameters of the electron sheet in a linearly polarized laser pulse are derived and compared with the numerical solutions for the central electron sheet (positioned initially in the center) of the real plasma layer, which are calculated from the general numerical-analytical model. This comparison shows that the model II gives better description for the trajectory of the central electron sheet of the real plasma layer, while the model I gives more adequate description for a transverse momentum. Both models show that if the intensity of the laser pulse is high enough, even in the field with a constant amplitude, the electrons undergo not only the transverse oscillations with the period of the laser field, but also large (in comparison with the laser wavelength) longitudinal oscillations with the period, defined by the system parameters and initial conditions of particular oscillation.

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Section: Introductionmentioning

confidence: 99%

Flying mirror model for interaction of a super-intense nonadiabatic laser pulse with a thin plasma layer: Dynamics of electrons in a linearly polarized external field

Kulagin¹,

Черепенин

Hur³

et al. 2007

Physics of Plasmas

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“…1998; Yu et al. 1999; Cairns, Rau & Airila 2000) were proposed for this striking result, which remained somehow controversial (Gibbon 2005). The laser pulse ( , ) was focused onto a 100 nm thick plastic foil at different power levels, so that the intensity on target varied from to .…”

Section: Evidence For Spm In Plasmas With ‘Short’ Pulsesmentioning

confidence: 99%

“…In a rather puzzling experiment, propagation of a femtosecond laser pulse through an over-dense (n e > n c ) plasma was demonstrated at an intensity exceeding 5 × 10 16 W cm −2 , while at 3 × 10 18 W cm −2 the layer became almost transparent (Giulietti et al 1997). A number of model explanations (Teychenné et al 1998;Yu et al 1999;Cairns, Rau & Airila 2000) were proposed for this striking result, which remained somehow controversial (Gibbon 2005). The laser pulse (λ 0 = 815 nm, τ L = 30 fs) was focused onto a 100 nm thick plastic foil at different power levels, so that the intensity on target varied from 5 × 10 16 to 3 × 10 18 W cm −2 .…”

Section: Evidence For Spm In Plasmas With 'Short' Pulsesmentioning

confidence: 99%

Self-phase modulation in various regimes of intense laser–plasma interactions

Giulietti

2015

J. Plasma Phys.

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Creation of plasmas by intense laser pulses and consequent laser–plasma interactions involve highly non-linear processes. In particular, a variation of the refractive index induced by the laser action turns into a self-phase modulation (SPM) of the laser field. This effect, already observed with nanosecond laser pulses, achieves striking evidence with ultra-short pulses whose intensity can produce index changes in a time as short as a single optical cycle. In this condition, spectral modifications of the laser pulse produced by SPM may strongly modify the laser–plasma interaction. At the same time, the spectral analysis of the transmitted and scattered laser radiation gives valuable information on a variety of processes occurring in the plasma. In this paper we simply consider a few results, which can be attributed to SPM, with the aim of comparing nanosecond and sub-picosecond laser interaction regimes at moderate laser intensities.

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“…For a hot plasma, however, enhanced penetration (compared to predictions from the simple cold plasma dispersion relation (Cairns, Rau & Airila 2000)) is somewhat easier to understand. Simulations (Pukhov, Sheng & Meyer-ter Vehn 1999) find that the temperature of the electrons goes up as with the intensity of the laser beam.…”

Section: Electromagnetic Waves and Self-induced Transparencymentioning

confidence: 99%

Explicitly covariant dispersion relations and self-induced transparency

Mahajan

Asenjo

2017

J. Plasma Phys.

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Explicitly covariant dispersion relations for a variety of plasma waves in unmagnetized and magnetized plasmas are derived in a systematic manner from a fully covariant plasma formulation. One needs to invoke relatively little known invariant combinations constructed from the ambient electromagnetic fields and the wave vector to accomplish the program. The implication of this work applied to the self-induced transparency effect is discussed. Some problems arising from the inconsistent use of relativity are pointed out.

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Enhanced transmission of laser light through thin slabs of overdense plasmas

Cited by 8 publications

References 10 publications

Flying mirror model for interaction of a super-intense nonadiabatic laser pulse with a thin plasma layer: Dynamics of electrons in a linearly polarized external field

Flying mirror model for interaction of a super-intense nonadiabatic laser pulse with a thin plasma layer: Dynamics of electrons in a linearly polarized external field

Self-phase modulation in various regimes of intense laser–plasma interactions

Explicitly covariant dispersion relations and self-induced transparency

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