Physical Review E

Kinetic Monte Carlo simulations for transient thermal fields: Computational methodology and application to the submicrosecond laser processes in implanted silicon

Author(s): G. Fisicaro, L. Pelaz, P. Lopez, and A. La Magna

Pulsed laser irradiation of damaged solids promotes ultrafast nonequilibrium kinetics, on the submicrosecond scale, leading to microscopic modifications of the material state. Reliable theoretical predictions of this evolution can be achieved only by simulating particle interactions in the presence ...

[Phys. Rev. E 86, 036705] Published Thu Sep 27, 2012

Nonlinear propagation of light in structured media: Generalized unidirectional pulse propagation equations

Author(s): J. Andreasen and M. Kolesik

Unidirectional pulse propagation equations [UPPE, Phys. Rev. E 70 036604 (2004)] have provided a theoretical underpinning for computer-aided investigations into dynamics of high-power ultrashort laser pulses and have been successfully utilized for almost a decade. Unfortunately, they are restricte...

[Phys. Rev. E 86, 036706] Published Thu Sep 27, 2012

Cavitation dynamics and directional microbubble ejection induced by intense femtosecond laser pulses in liquids

Author(s): D. Faccio, G. Tamošauskas, E. Rubino, J. Darginavičius, D. G. Papazoglou, S. Tzortzakis, A. Couairon, and A. Dubietis

We study cavitation dynamics when focusing ring-shaped femtosecond laser beams in water. This focusing geometry reduces detrimental nonlinear beam distortions and enhances energy deposition within the medium, localized at the focal spot. We observe remarkable postcollapse dynamics of elongated cavit...

[Phys. Rev. E 86, 036304] Published Wed Sep 05, 2012

Modeling of radiation losses in ultrahigh power laser-matter interaction

Author(s): R. Capdessus, E. d'Humières, and V. T. Tikhonchuk

Radiation losses of electrons in ultraintense laser fields constitute a process that can be important for electron and ion acceleration and creation of secondary emissions. The importance of this effect for ion acceleration to high energies is studied as a function of the laser intensity and the tar...

[Phys. Rev. E 86, 036401] Published Tue Sep 04, 2012

Coupling of detailed configuration kinetics and hydrodynamics in materials submitted to x-ray free-electron-laser irradiation

Author(s): O. Peyrusse

We describe a model for the study of the interaction of short x-ray free-electron laser (XFEL) pulses with matter. Hydrodynamics is solved in one-dimensional planar geometry together with XFEL energy deposition, transport by thermal conduction and electron-ion energy exchange. Along with XFEL energy...

[Phys. Rev. E 86, 036403] Published Tue Sep 04, 2012

Plasma effects on harmonic spectra generated from moderately relativistic laser-plasma interactions

Author(s): R. Ondarza-Rovira and T. J. M. Boyd

When intense p-polarized laser light is incident on a plasma with an electron density many times the critical density, the flux of fast electrons created by Brunel absorption excites plasma oscillations. These oscillations may in turn affect the spectrum of high harmonics by modulating the spectrum ...

[Phys. Rev. E 86, 026407] Published Wed Aug 29, 2012

Energy transport in short-pulse-laser-heated targets measured using extreme ultraviolet laser backlighting

Author(s): L. A. Wilson, G. J. Tallents, J. Pasley, D. S. Whittaker, S. J. Rose, O. Guilbaud, K. Cassou, S. Kazamias, S. Daboussi, M. Pittman, O. Delmas, J. Demailly, O. Neveu, and D. Ros

The accurate characterization of thermal electron transport and the determination of heating by suprathermal electrons in laser driven solid targets are both issues of great importance to the current experiments being performed at the National Ignition Facility, which aims to achieve thermonuclear f...

[Phys. Rev. E 86, 026406] Published Tue Aug 28, 2012

Effect of the Rayleigh-Taylor instability on maximum reachable temperatures in laser-induced bubbles

Author(s): Ludmila M. Rechiman, Fabián J. Bonetto, and Juan M. Rosselló

Laser-induced bubbles provide an effective vehicle to achieve high-energy concentrations and maximum temperatures in bubble luminescence phenomena. One limitation to the temperatures that can be achieved is the development of the Rayleigh-Taylor instability (RTI) during the instants previous to the ...

[Phys. Rev. E 86, 027301] Published Wed Aug 15, 2012

Time dependence of fast electron beam divergence in ultraintense laser-plasma interactions

Author(s): K. U. Akli, M. J. Storm, M. McMahon, S. Jiang, V. Ovchinnikov, D. W. Schumacher, R. R. Freeman, G. Dyer, and T. Ditmire

We report on the measurement and computer simulation of the divergence of fast electrons generated in an ultraintense laser-plasma interaction (LPI) and the subsequent propagation in a nonrefluxing target. We show that, at Iλ2 of 1020 Wcm−2 μm2, the time-integrated electron beam full divergence angl...

[Phys. Rev. E 86, 026404] Published Tue Aug 14, 2012

Hopf bifurcation to square-wave switching in mutually coupled semiconductor lasers

Author(s): M. Sciamanna, M. Virte, C. Masoller, and A. Gavrielides

Using advanced continuation techniques for dynamical systems, we elucidate the bifurcations leading to asymptotically stable square-wave pulsing and polarization mode switching in semiconductor lasers with mutual time-delayed and polarization rotating coupling. We find that the increase of coupling ...

[Phys. Rev. E 86, 016218] Published Mon Jul 30, 2012

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