Harmonic emission from cluster nanoplasmas subject to intense short laser pulses

Popruzhenko, S. V.; Kundu, M.; Zaretsky, D.F.; Bauer, Dieter

doi:10.1103/physreva.77.063201

Cited by 35 publications

(34 citation statements)

References 50 publications

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“…5 Similar curves are shown in Fig. 5 of [61] During the interaction with the probe wave, "recombination" to lower energy levels may occur in the transition to equilibrium. Of course, the electron can also gain energy, and these two processes compete with each other.…”

Section: Results and Analysissupporting

confidence: 60%

Amplification of a high-frequency wave by IR-field-heatedclusters

Korneev

Becker²

2010

Laser Phys. Lett.

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The nonequilibrium nanoplasma created by irradiation of a cluster, or other nanosystems such as large molecules, with an intense infrared-laser field may be used as an amplifying medium for a high-frequency probe field. We employ a simple description where the nanosystem is modeled by particles bound by a self-consitent potential. An incident probe field suffers gain or loss depending on the respective parameters by a mechanism that is usually referred to as collisionless damping. The model is simple enough to allow for an essentially analytical solution. Absorption rate of the nonequilibrium cluster. Negative absorption corresponds to amplification. See text below for further explanations

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Section: Results and Analysissupporting

confidence: 60%

Amplification of a high-frequency wave by IR-field-heatedclusters

Korneev

Becker²

2010

Laser Phys. Lett.

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“…The nonlinearity of this process arises from the fact that the laser displaces the electron cloud relative to the ions. The electrons that are driven beyond the cluster surface feel a nonlinear restoring force, resulting in the creation of odd harmonic radiation [56,57]. For the cluster sizes investigated here, propagation effects do not play a major role in odd harmonic generation, as they are well described by electrostatic MD (see Fig.…”

Section: Microscopic Analysis Of Nonlinear Light Scatteringmentioning

confidence: 80%

Light wave driven electron dynamics in clusters

et al. 2014

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The dynamics of solid-density nanoplasmas driven by intense lasers takes place in the strongly-coupled plasma regime, where collisions play an important role. The microscopic particle-in-cell method has enabled the complete classical electromagnetic description of these processes. The theoretical foundation of the approach and its relation to existing methods are reviewed. Selected applications to laser cluster processes are presented that have been inaccessible to numerical simulation so far.

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Section: Microscopic Analysis Of Nonlinear Light Scatteringmentioning

confidence: 84%

Light Wave Driven Electron Dynamics in Clusters

Varin¹,

Peltz²,

Brabec³

et al. 2014

Attosecond Nanophysics

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IntroductionWhen matter is exposed to intense non-relativistic laser fields, ionization takes place; the irradiated material is turned into plasma, which absorbs energy from the laser field resulting in the heating and acceleration of charged plasma particles. Non-relativistic light-matter interaction encompasses a broad spectrum of applications. Lasers can be used for micro-machining and modification of materials, such as metals and dielectrics [1,2]. Whereas micro-machining is of interest for high-precision industrial applications, material modification can be used to write channels into dielectrics for the realization of 3D microfluidic chips [3] or 3D integrated photonic devices for telecommunication [4]. On the other hand, the interaction of lasers and nano-objects, such as clusters and nano-layers, is of great interest for the realization of pulsed X-ray, electron, ion, and neutron sources [5]. In a laser-induced nano-plasma, a significant portion of the heated electrons leave, resulting in a positive charge up of the target and subsequent space charge acceleration of the ions. In such a hot and charged plasma, X-ray radiation is created by electron recombination. Nuclear processes can also take place during ion collisions resulting in the generation of neutrons and other nuclear particles. Finally-when irradiated at somewhat lower intensities below the damage threshold-nanostructures in general exhibit strong coherent field enhancement that is of interest for high-harmonic generation, low energy electron acceleration, and attosecond near-field microscopy [6-10]. These processes, as well as those mentioned so far, take place in the realm of strongly coupled plasma physics, where the use of traditional plasma tools-developed for weakly coupled plasmas-becomes questionable.Modelling the interaction processes between laser light and strongly coupled plasmas is challenging. To model strongly coupled plasmas, the classical trajectories of all electrons and ions have to be traced. On the one hand, microscopic processes such as collisions have to be fully resolved, requiring a space resolution of about one atomic unit (0.529 Å). On the other hand, wave propagation phenomena need to be captured, which takes place on the order of the laser wavelength;

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Harmonic emission from cluster nanoplasmas subject to intense short laser pulses

Cited by 35 publications

References 50 publications

Amplification of a high-frequency wave by IR-field-heatedclusters

Amplification of a high-frequency wave by IR-field-heatedclusters

Light wave driven electron dynamics in clusters

Light Wave Driven Electron Dynamics in Clusters

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