Extreme high field plasmonics: Electron acceleration and XUV harmonic generation from ultrashort surface plasmons

Cantono, Giada; Fedeli, Luca; Pisani, Francesco; Ceccotti, T.

doi:10.1063/1.5086537

Cited by 4 publications

(3 citation statements)

References 65 publications

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“…In experiments 31 – 34 , increasing laser intensity in the high relativistic regime is mostly obtained with highly focused ultra-short duration pulse. As just discussed, this has consequences on the SPW mode distribution.…”

Section: Resultsmentioning

confidence: 80%

Excitation of surface plasma waves and fast electron generation in relativistic laser–plasma interaction

Raynaud

Héron

Adam

2020

Sci Rep

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The excitation of surface plasma waves (SPW) by an intense short laser pulse is a useful tool to enhance the laser absorption and the electron heating in the target. In this work, the influence of the transverse laser profile and the pulse duration used to excited SPW is investigated from Fluid and 2D Particle-in-Cell simulations. We show the existence of a lobe of surface plasma wave modes. Our results highlight surface plasma waves excitation mechanism and define the laser parameters to optimise the SPW excitation and the kinetic energy of the associated electron trapped in the wave. It opens the door to monitor the spectral mode distribution and temporal shape of the excited surface waves in the high relativistic regime. The most important result of the study is that—at least in 2D—the charge and the energy of the electron bunches depend essentially on the laser energy rather than on temporal or spatial shape of the laser pulse.

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Section: Resultsmentioning

confidence: 80%

Excitation of surface plasma waves and fast electron generation in relativistic laser–plasma interaction

Raynaud

Héron

Adam

2020

Sci Rep

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“…Furthermore, observation of a temporally induced reflection, which to our knowledge has not yet been achieved, is determined by the amplitude of the refractive index modulations and seems possible with optical Rydberg experiments. Extremely fast temporal processes associated with attosecond pulses, which are now available by high-harmonic generation [37,38], could also be useful in the Rydberg atom context. This will be explored in the future.…”

Section: Discussionmentioning

confidence: 99%

Temporal optical processes in a Rydberg gas

Mendonça

2020

J. Phys. B: At. Mol. Opt. Phys.

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In this paper, we discuss temporal optical phenomena in a gas of Rydberg atoms, which can take place in the presence of varying quasi-static electric fields and control laser beams. This includes the discussion of spectral changes of probe laser beams, associated with purely temporal processes created by Stark and ac-Stark shifts of the atomic susceptibility. Such changes include phase and group velocity perturbations, time delays, frequency shifts, and other temporal changes of the transmitted and reflected probe signals. We mainly focus on ultrafast temporal transitions, known as time-refraction, and their specific signatures, which envolve the occurrence of a temporally induced reflection coefficient. Our model assumes that the temporal variations of the applied Stark shifts are much shorter than the Rydberg life-times. We also discuss the optical properties of a temporally perturbed Rydberg-EIT configuration, and the expected influence of dipole blockade. This could eventually lead to new experimental studies in Rydberg optics.

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“…To improve the laser-induced electron acceleration performances [24][25][26], the fabrication of patterned targets with ordered periodic gratings has also been considered. Such "grating" targets can be used for better control of the interaction of the ultra-intense laser pulse with matter via relativistic surface plasmons [25].…”

Section: Micro/nanostructured Targets Strategies Metallic Gratingsmentioning

confidence: 99%

Structuring Free-Standing Foils for Laser-Driven Particle Acceleration Experiments

et al. 2021

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The recent development of petawatt-class laser systems sets a focus on the development of ultra-thin free-standing targets to access enhanced particle acceleration schemes vital for future applications, such as, medical and laser-driven nuclear physics. Specific strategies are required to improve the laser-to-particle energy conversion efficiency and increase the maximum particle energy. One of the promising approaches is based on the target design optimization; either by tuning key parameters which will strongly affect the laser-matter interaction process (e.g., material, composition, density, thickness, lateral dimensions, and shape) or by using micro/nanostructures on the target surface. At ELI-NP, considerable efforts are dedicated to extend the target capabilities beyond simple planar target design and develop complex targets with tailored properties suitable for high-power laser-plasma interaction experiments, as well as for studies with gamma and positrons beams. The paper provides an overview of the manufacturing capabilities currently available within ELI-NP Targets Laboratory for providing users with certain types of solid targets, specifically micro/nanostructured gold and copper foils and microns thick, porous anodized alumina. Also, optimization studies of alternative patterns (micro/nanodots) on silicon substrate are presented for future implementation on metallic free-standing thin foils.

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Extreme high field plasmonics: Electron acceleration and XUV harmonic generation from ultrashort surface plasmons

Cited by 4 publications

References 65 publications

Excitation of surface plasma waves and fast electron generation in relativistic laser–plasma interaction

Excitation of surface plasma waves and fast electron generation in relativistic laser–plasma interaction

Temporal optical processes in a Rydberg gas

Structuring Free-Standing Foils for Laser-Driven Particle Acceleration Experiments

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