Magnetic Field Generation in Plasma Waves Driven by Copropagating Intense Twisted Lasers

Shi, Yin; Vieira, Jorge; Trines, R. M. G. M.; Bingham, R.; Shen, Baifei; Kingham, R. J.

doi:10.1103/physrevlett.121.145002

Cited by 80 publications

(58 citation statements)

References 31 publications

(58 reference statements)

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“…The resulting field structure is significantly more complex than the field described in Ref. 9 , we also present numerical results which match the theoretical predictions made here.…”

Section: Introductionsupporting

confidence: 81%

“…This phenomenon was previously observed in simulations described in Ref. 9 where two co-propagating OAM laser pulses with differing angular mode, frequency, and wavelength are injected into a plasma and couple with an OAM plasmon. The resulting plasmon is shown to generate a second-order quasi-static magnetic field.…”

Section: Introductionsupporting

confidence: 65%

“…By substituting expressions (9) and (10) in that equation one transforms it in a system of algebraic equations for the potential amplitudes φ p,l and partial distribution functions f p,l (v).…”

Section: B Lg Modes Presentation For the Plasma Wavementioning

confidence: 99%

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Kinetic plasma waves carrying orbital angular momentum

et al. 2019

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The structure of Langmuir plasma waves carrying a finite angular orbital momentum is revised in the paraxial optics approximation. It is shown that the kinetic effects related to higher-order momenta of the electron distribution function lead to coupling of Laguerre-Gaussian modes and result in modification of the wave dispersion and damping. The theoretical analysis is compared to the three-dimensional particle-in-cell numerical simulations for a mode with orbital momentum l = 2. It is demonstrated that propagation of such a plasma wave is accompanied with generation of quasi-static axial and azimuthal magnetic fields which are consequence of the longitudinal and orbital momentum transported with the wave.1

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“…The resulting field structure is significantly more complex than the field described in Ref. 9 , we also present numerical results which match the theoretical predictions made here.…”

Section: Introductionsupporting

confidence: 81%

Section: Introductionsupporting

confidence: 65%

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Kinetic plasma waves carrying orbital angular momentum

et al. 2019

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“…Nuter et al proposed that the combination of strong radial and longitudinal electric fields present in tightly focused radial laser beams can transfer angular momentum to electrons through a dissipationless, optical process, resulting in 100-T magnetic fields [21]. Shi et al have demonstrated that two copropagating vortex beams with different frequencies and topological charge produce a twisted ponderomotive force, leaving behind a solenoidal current and quasistatic magnetic field up to 40 T [22].Although these would be powerful new techniques for charged beam collimation, they each rely on laser modes * msederbe@uottawa.ca…”

mentioning

confidence: 99%

Tesla-Scale Terahertz Magnetic Impulses

2020

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Measuring the magnetic response of matter relies acutely on the degree to which a magnetic field source's amplitude, spatial, and temporal character can be tailored. Magnetic fields are inseparable from light-matter interaction, yet due to the dominance of electric-field-induced effects in many systems, laser pulses have heretofore provided comparatively limited insight into the high-frequency magnetic response of matter. Conductors or superconductors arranged in a solenoidal configuration embody the state-ofthe-art apparatus for generating spatially isolated magnetic fields, but the reliance on electrical circuitry limits the field amplitude, pulse brevity, and absolute timing of the generated fields. We transfer the concept of solenoidal currents commonly leveraged in electromagnets to photo-ionized electrons driven by moderately intense vector laser beams, in a scheme that does not require the laser mode to carry orbital angular momentum. We predict that this all-optical approach will enable magnetic fields exceeding 8 Tesla to be turned on within 50 femtoseconds using moderate laser intensities, an unprecedented combination of parameters that will open the possibility for ultrafast metrological techniques to be combined with intense, spatially isolated, magnetic fields.Magnetic fields play a fundamental role in our understanding of magnetic materials [1], electron spins [2,3], superconductivity [4][5][6], quantum and topological systems [7-9], plasma and nuclear fusion [10-12], medical diagnosis [13], and astrophysics [14]. Electric charge in motion generates magnetic fields [15,16], and the arrangement of conductors or superconductors into loops or solenoids has been the workhorse approach to magnetic field sources for decades. Although effective for measuring the quasistatic magnetic response of matter, the ultrafast dynamics that ultimately produces this response remains largely inaccessible.As an alternative, relativistic electron bunches have been used to introduce a strong magnetic pulse of 2.3 ps duration to a granular recording film [17]. The application of large magnetic fields of short duration enables insight into the maximum switching bandwidth of the magnetic material before the onset of magnetic disorder. Although these results provide intriguing fundamental insight with important technological implications, the large-scale electron acceleration facility required for these measurements limits the exploration of ultrafast dynamics in other material systems.Extensive effort has been devoted to optically exciting solenoidal currents and high magnetic fields in underdense plasmas using relativistic laser pulses, for the purpose of charged beam collimation. Early approaches were based on the inverse Faraday effect [18], whereby the angular momentum is transferred from a circularly polarized beam to the plasma via dissipative effects. The recent availability of optical vortex beams [i.e., laser modes that carry orbital angular momentum (OAM)] at relativistic intensities [19] has motivated new approach...

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“…Although the generation of plasma AM is claimed to originate from the torque of the generated vortex beam [14], the exact dynamics that cause the plasma AM are still unclear. However, a plasma with huge AM has great potential in generating very strong longitudinal magnetic fields [33][34][35][36], and may bring insight into laboratory astrophysics [37]. Therefore, an investigation into the evolution of plasma AM during vortex pulse generation is necessary.…”

Section: Introductionmentioning

confidence: 99%

Angular momentum oscillation in spiral-shaped foil plasmas

et al. 2019

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Two types of spiral-shaped foils are investigated for generating significant angular momentum (AM) in plasmas by reflecting a relativistic Gaussian pulse into a vortex laser beam with the same topological charge. This is the first time to find that AM oscillation exists in specific spiral-shaped foils during laser-plasma interaction, while AM oscillation is not observed in other types of foils. Both threedimensional particle-in-cell simulations and theoretical results have confirmed this finding. AM oscillation is demonstrated to be induced by the asymmetric field on the foil surface, and this asymmetric field can be modulated in order to strengthen or weaken the oscillation amplitude by redesigning the foil surface. AM oscillation is expected to bring insight into radiation, particle heating and other mechanisms with AM effects.

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Magnetic Field Generation in Plasma Waves Driven by Copropagating Intense Twisted Lasers

Cited by 80 publications

References 31 publications

Kinetic plasma waves carrying orbital angular momentum

Kinetic plasma waves carrying orbital angular momentum

Tesla-Scale Terahertz Magnetic Impulses

Angular momentum oscillation in spiral-shaped foil plasmas

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