The inverse Faraday effect in plasma produced by circularly polarized laser light in the range of intensities 109–1014 W/cm2

Horovitz, Y.; Eliezer, S.; Henis, Z.; Paiss, Y.; Moshe, E.; Ludmirsky, A.; Werdiger, M.; Arad, B.; Zigler, A.

doi:10.1016/s0375-9601(98)00487-3

Cited by 26 publications

(8 citation statements)

References 13 publications

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“…In recent experiments with solid targets and high laser flux [5] huge B-fields have been measured around 10-100 MG, while these fields have been predicted theoretically both in the underdense [6] and in the overdense cases [7]. Lower fields have been also detected at lower fluxes, showing the same intensity dependence as at high laser flux [8,9]. Numerical simulations involving particle in cell (PIC) codes [10] in both cases have also confirmed the creation of large self-generated B-fields during the laser pulse propagation.…”

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confidence: 80%

Intense self-generated magnetic field in the interaction of a femtosecond laser pulse with an underdense plasma

Lehner

2000

Europhys. Lett.

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The interaction of femtosecond (80 fs) laser pulses with an underdense gas at moderate laser intensity of 3-5 • 10 15 W/cm 2 is studied. We report especially on time-resolved measurements of intense self-generated magnetic fields above 30 T at the given irradiance using a pump probe device with a Faraday rotation diagnosis on the probe pulse. The induced magnetic field is found far above the one predicted by the inverse Faraday effect. The theoretical mechanism responsible for this strong field production is identified as a self-ponderomotive effect induced by the pump pulse.

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confidence: 80%

Intense self-generated magnetic field in the interaction of a femtosecond laser pulse with an underdense plasma

Lehner

2000

Europhys. Lett.

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“…On the optomagnetic part, we use a classical approach in plasma science 55 to calculate inverse Faraday effect using the optical field. The estimated amplitude of inverse Faraday effect is typically in the 0.1 to 30 T range in AOS 24 , 32 , 34 , 57 , 62 , 63 . A macroscopic Fockker-Planck and Landau-Lifshitz-Bloch (LLB) model is used to describe the transient response of the magnetization under finite temperature 46 .…”

Section: Methodsmentioning

confidence: 99%

Prediction of Deterministic All-Optical Switching of Ferromagnetic Thin Film by Ultrafast Optothermal and Optomagnetic Couplings

Chen

Cheng

et al. 2017

Sci Rep

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All-optical switching (AOS) of magnetization induced by ultrafast laser pulses is fundamentally interesting and promises unprecedented speed for magnetic data storage that is three orders of magnitudes faster than the current techniques. For ferrimagnetic material, the AOS is attributed to magnetic circular dichroism and angular momentum transfer between sublattices. Recently, ferromagnetic material is demonstrated in AOS under multiple pulses. Since the magnetic field needed to flip the ferromagnetic magnetization within femtosecond timescale is unphysically high, some theories hypothesized that there exists a prolonged magnetic field beyond the pulse duration in the switching process. This is intuitively inconsistent with the phenomenological explanation based on the light-induced magnetic field arising from the inverse Faraday effect (IFE). Here, we numerically study the AOS process and provide new insights into the long-standing paradox of the duration of the induced magnetic field. We show that the prolonged magnetic field duration originates from the ultrafast optothermal and optomagnetic coupling. Moreover, we numerically studied both single- and multiple-pulse AOS under different coupling strength between spins and the thermal bath in the macroscopic Fockker-Planck and Landau-Lifshitz-Bloch model. This numerical model may provide a guide to find suitable ferromagnetic materials for AOS.

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“…( 4 a) gives axial field strength of MG, showing a close correspondence, which is not present with analytical models presented therein that heavily underestimate the magnetic field strength, as discussed by the authors. Another experimental work 33 observed axial magnetic field due to nonlinear inverse Faraday effect with MG for m, , and for such values, Eq. ( 4 a) gives MG.…”

Section: Resultsmentioning

confidence: 93%

Generation of intense magnetic wakes by relativistic laser pulses in plasma

Lamač

Chaulagain

Nejdl

et al. 2023

Sci Rep

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The emergence of petawatt lasers focused to relativistic intensities enables all-optical laboratory generation of intense magnetic fields in plasmas, which are of great interest due to their ubiquity in astrophysical phenomena. In this work, we study generation of spatially extended and long-lived intense magnetic fields. We show that such magnetic fields, scaling up to the gigagauss range, can be generated by interaction of petawatt laser pulses with relativistically underdense plasma. With three-dimensional particle-in-cell simulations we investigate generation of magnetic fields with strengths up to $$10^{10}$$ 10 10 G and perform a large multi-parametric study of magnetic field in dependence on dimensionless laser amplitude $$a_{0}$$ a 0 and normalized plasma density $$n_{e}/n_{c}$$ n e / n c . The numerical results yield scaling laws that closely follow derived analytical result $$B \propto \sqrt{a_{0}n_{e}/n_{c}}$$ B ∝ a 0 n e / n c , and further show a close match with previous experimental works. Furthermore, we show in three-dimensional geometry that the decay of the magnetic wake is governed by current filament bending instability, which develops similarly to von Kármán vortex street in its nonlinear stage.

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The inverse Faraday effect in plasma produced by circularly polarized laser light in the range of intensities 109–1014 W/cm2

Cited by 26 publications

References 13 publications

Intense self-generated magnetic field in the interaction of a femtosecond laser pulse with an underdense plasma

Intense self-generated magnetic field in the interaction of a femtosecond laser pulse with an underdense plasma

Prediction of Deterministic All-Optical Switching of Ferromagnetic Thin Film by Ultrafast Optothermal and Optomagnetic Couplings

Generation of intense magnetic wakes by relativistic laser pulses in plasma

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