Dynamics of the disruption of a nanoparticle totally ionized by a powerful ultrashort laser pulse

Gruzdev, Vitali E.; Komolov, V. L.; Przhibel’skiĭ, S. G.; Smirnov, D. S.

doi:10.1364/jot.73.000378

Cited by 4 publications

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“…So, the total ionization degree of a nanoparticle to the pulse end can be estimated as (4) where N is the electron density in metal.…”

Section: Evaluation Of Ionization Degreementioning

confidence: 99%

“…To analyse the dynamics of the ion expansion, we used a simplified model proposed earlier [4][5][6] for Fig. 5.…”

Section: Simulation Of Ion Motion Dynamics (Continual Approximation)mentioning

confidence: 99%

“…Earlier [4][5][6], we proposed a simple method of analysis of the Coulomb explosion of nanoparticles due to their photoionization. It was shown that the electric field of uncompensated charge arising during the photoionization of nanoparticles can cause the movement of arising ions and accelerate them up to rather high energies.…”

Section: Introductionmentioning

confidence: 99%

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Nanoscale modification of dielectrics under ultrashort laser pulses action on the nanoparticle-at-the-substrate system

Komolov¹

2011

Lith. J. Phys.

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The results of theoretical analysis of the response of solid nanoparticles on the dielectric surface to the intense ultrashort laser pulse (USlP) action are presented. The estimation of the ionization degree of nanoparticles with permanently changing charge on the composition, intensity and laser pulse duration has been carried out using a simple analytical model. The dynamics of non-thermal destruction of nanoparticles and associated changes in the substrate surface due to the implantation of ions emitted from nanoparticles has been studied using numerical simulation.

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“…So, the total ionization degree of a nanoparticle to the pulse end can be estimated as (4) where N is the electron density in metal.…”

Section: Evaluation Of Ionization Degreementioning

confidence: 99%

“…To analyse the dynamics of the ion expansion, we used a simplified model proposed earlier [4][5][6] for Fig. 5.…”

Section: Simulation Of Ion Motion Dynamics (Continual Approximation)mentioning

confidence: 99%

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Nanoscale modification of dielectrics under ultrashort laser pulses action on the nanoparticle-at-the-substrate system

Komolov¹

2011

Lith. J. Phys.

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“…Earlier in Refs. [1,2] we had studied the case when the disturbance of charge equilibrium in a solid due to its ionization under intensive light pulse causes the damage. Now we analyze the possible solid response under the action of pulses with "moderate" intensity, when the arising Coulomb forces are too weak to cause damage, but strong enough to create the nanoscale defects in the near-surface layer of solid.…”

Section: Introductionmentioning

confidence: 99%

“…Intensive short laser pulses can ionize the dielectric medium, forming an array of randomly distributed ions [1][2][3][4]. The Coulomb interaction of ions causes their displacement and mechanical stresses inside the medium.…”

Section: Introductionmentioning

confidence: 99%

Modifications in Near-Surface Layer of Transparent Dielectrics Ionized by Ultrashort Laser Pulses

Komolov

Przhibel’skiĭ

2008

Acta Phys. Pol. A

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Formation of spatially non-uniform mechanical tension in a transparent solid due to the lattice ionization under the intensive ultrashort laser pulses action is predicted and theoretically described. Within the framework of the continual theory of elasticity the estimation of both average values of deformation tensor and its variations in solid dielectric with non-uniform random distribution of ions was carried out. It was shown that three possible types of medium modification can arise in solid depending on its ionization degree and the thickness of ionized layer. Since the Coulomb fields inside ionized layer can be non-uniform, all three types of structuring can arise in solid simultaneously.

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Dynamics of laser-induced damage of spherical nanoparticles by high-intensity ultrashort laser pulses

et al. 2012

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Damage of a metal spherical nanoparticle by femtosecond laser pulses is analyzed by splitting the overall process into two steps. The fast step includes electron photoemission from a nanoparticle. It takes place during direct action of a laser pulse and its rate is evaluated as a function of laser and particle parameters by two approaches. Obtained results suggest the formation of significant positive charge of the nanoparticles due to the photoemission. The next step includes ion emission that removes the excessive positive charge and modifies particle structure. It is delayed with respect to the photo-emission and is analyzed by a simple analytical model and modified molecular dynamics. Obtained energy distribution suggests generation of fast ions capable of penetrating into surrounding material and generating defects next to the nanoparticle. The modeling is extended to the case of a nanoparticle on a solid surface to understand the basic mechanism of surface laser damage initiated by nano-contamination. Simulations predict embedding the emitted ions into substrate within a spot with size significantly exceeding the original particle size. We discuss the relation of those effects to the problem of bulk and surface laser-induced damage of optical materials by single and multiple ultrashort laser pulses. Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/18/2015 Terms of Use: http://spiedl.org/terms Optical Engineering 121816-5 December 2012/Vol. 51(12) Komolov et al.: Dynamics of laser-induced damage of spherical nanoparticles by high-intensity : : : Downloaded From: http://opticalengineering.spiedigitallibrary.org/ on 05/18/2015 Terms of Use: http://spiedl.org/terms

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Dynamics of the disruption of a nanoparticle totally ionized by a powerful ultrashort laser pulse

Cited by 4 publications

References 0 publications

Nanoscale modification of dielectrics under ultrashort laser pulses action on the nanoparticle-at-the-substrate system

Nanoscale modification of dielectrics under ultrashort laser pulses action on the nanoparticle-at-the-substrate system

Modifications in Near-Surface Layer of Transparent Dielectrics Ionized by Ultrashort Laser Pulses

Dynamics of laser-induced damage of spherical nanoparticles by high-intensity ultrashort laser pulses

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