Generation of Zeptosecond Electromagnetic Pulses by Electrons Under their Interaction with Femtosecond Laser Pulses

Galkin, A. L.; Korobkin, V. V.; Romanovsky, M. Yu.; Shiryaev, O. B.

doi:10.1002/ctpp.200910060

Cited by 8 publications

(7 citation statements)

References 18 publications

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“…The great advantage of the classical approach is that calculations can be carried out quite easily, even for an arbitrary space and time dependent laser field. For this reason, the classical approach is extensively used in plasma physics and also in the context of ultra-short pulse generation [39][40][41][42][43][44]. Even though Thomson theory has some important shortcomings.…”

Section: Synthesis Of Short Pulsesmentioning

confidence: 99%

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Global phase and frequency comb structures in nonlinear Compton and Thomson scattering

2014

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The Compton and Thomson radiation spectra, generated in collisions of an electron beam with a powerful laser beam, are studied in the framework of quantum and classical electrodynamics, respectively. We show that there are frequency regimes where both radiation spectra are nearly identical, which for Compton scattering relates to the process which preserves the electron spin. Although the radiation spectra are nearly identical, the corresponding probability amplitudes exhibit different global phases. This has pronounced consequences, which we demonstrate by investigating temporal power distributions in both cases. We show that, contrary to Thomson scattering, it is not always possible to synthesize short laser pulses from Compton radiation. This happens when the global phase of the Compton amplitude varies in a nonlinear way with the frequency of emitted photons. We also demonstrate that while the Compton process driven by a non-chirped laser pulse can generate chirped bursts of radiation, this is not the case for the Thomson process. In principle, both processes can lead to a generation of coherent frequency combs when single or multiple driving laser pulses collide with electrons. Once we synthesize these combs into short bursts of radiation, we can control them, for instance, by changing the time delay between the driving pulses.

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Section: Synthesis Of Short Pulsesmentioning

confidence: 99%

“…In this paper, we shall study the important role played by the global phase of probability amplitudes in nonlinear Compton scattering [16,17] and its classical approximation -nonlinear Thomson scattering [31][32][33][34][35][36][37][38][39][40][41][42][43][44]. For the classical theory we discuss the conditions of its applicability.…”

Section: Introductionmentioning

confidence: 99%

Global phase and frequency comb structures in nonlinear Compton and Thomson scattering

2014

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“…7. It was shown that an electron located far in front of the focus, after interaction, moves in the direction of negative z.…”

Section: Expressions For Energy and Angular Spectra Of Acceleratmentioning

confidence: 98%

Two-dimensional angular energy spectrum of electrons accelerated by the ultra-short relativistic laser pulse

2015

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The new method of calculating energy spectra of accelerated electrons, based on the parameterization by their initial coordinates, is proposed. The energy spectra of electrons accelerated by Gaussian ultra-short relativistic laser pulse at a selected angle to the axis of the optical system focusing the laser pulse in a low density gas are theoretically calculated. The two-peak structure of the electron energy spectrum is obtained. Discussed are the reasons for its appearance as well as an applicability of other models of the laser field. V C 2015 AIP Publishing LLC.

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“…[65,66]). For instance, the problem of generation of zeptosecond (or even yoctosecond) pulses is currently vigorously studied (see, e.g., [67][68][69][70][71][72][73] and references therein). We have shown, however, that quantum effects prohibit in general the generation of such extremely short pulses of radiation and, in some cases, lead to contradictions with the classical expectations [74].…”

Section: Total Energy Of Generated Radiationmentioning

confidence: 99%

Frequency scaling law for nonlinear Compton and Thomson scattering: Relevance of spin and polarization effects

Krajewska

Kamiński

2014

Phys. Rev. A

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The distributions of Compton and Thomson radiation for a shaped laser pulse colliding with a free electron are calculated in the framework of quantum and classical electrodynamics, respectively. We introduce a scaling law for the Compton and the Thomson frequency distributions which universally applies to long and short incident pulses. Thus, we extend the validity of frequency scaling postulated in previous studies comparing nonlinear Compton and Thomson processes. The scaling law introduced in this paper relates the Compton no-spin flipping process to the Thomson process over nearly the entire spectrum of emitted radiation, including its high-energy portion. By applying the frequency scaling, we identify that both spin and polarization effects are responsible for differences between classical and quantum results. The same frequency scaling applies to angular distributions and to temporal power distributions of emitted radiation, which we illustrate numerically.

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Generation of Zeptosecond Electromagnetic Pulses by Electrons Under their Interaction with Femtosecond Laser Pulses

Cited by 8 publications

References 18 publications

Global phase and frequency comb structures in nonlinear Compton and Thomson scattering

Global phase and frequency comb structures in nonlinear Compton and Thomson scattering

Two-dimensional angular energy spectrum of electrons accelerated by the ultra-short relativistic laser pulse

Frequency scaling law for nonlinear Compton and Thomson scattering: Relevance of spin and polarization effects

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