Virtual Journal of Laser

Author(s): Antoine Bourgeade and Guillaume Duchateau

When an intense and short laser pulse propagates in a dielectric material, significant production of conduction electrons through multiphoton absorption (MPA) may occur. In addition to the laser intensity, the MPA process depends mainly on the laser frequency spectrum which may evolve significantly ...

[Phys. Rev. E 85, 056403] Published Tue May 15, 2012

Author(s): S. Osborne, A. Amann, D. Bitauld, and S. O’Brien

We report on the observation of on-off intermittency in an optically injected dual-mode semiconductor laser. It is shown that quasi-single-mode chaotic dynamics of the injected mode are accompanied by intermittent and irregular bursts of the intensity of the uninjected mode. We define a threshold in...

[Phys. Rev. E 85, 056204] Published Thu May 10, 2012

Author(s): Takahisa Harayama, Satoshi Sunada, Kazuyuki Yoshimura, Jun Muramatsu, Ken-ichi Arai, Atsushi Uchida, and Peter Davis

We theoretically show that completely stochastic fast physical random bit generation at a rate of more than one gigabit per second can be realized by using lasers with optical delayed feedback which creates high-dimensional chaos of laser light outputs. The theory is based on the mixing property of ...

[Phys. Rev. E 85, 046215] Published Mon Apr 23, 2012

Author(s): J. Sanz, A. Debayle, and K. Mima

An analytical study of the relativistic interaction of a linearly polarized laser field of ω frequency with highly overdense plasma is presented. In agreement with one-dimensional particle-in-cell simulations, the model self-consistently explains the transition between the sheath inverse bremsstrahl...

[Phys. Rev. E 85, 046411] Published Thu Apr 19, 2012

Author(s): B. Kelleher, D. Goulding, B. Baselga Pascual, S. P. Hegarty, and G. Huyet

Two routes to phase-locking in the optically injected laser system are investigated both involving limit cycles where the phase of the slave laser is unlocked but is nevertheless bounded. We use an experimental phase-resolving technique to unambiguously demonstrate the phenomenon via explicit phasor...

[Phys. Rev. E 85, 046212] Published Wed Apr 18, 2012

Author(s): C. Michel, S. Tascu, V. Doya, P. Aschiéri, W. Blanc, O. Legrand, and F. Mortessagne

Wave billiards which are chaotic in the geometrical limit are known to support nongeneric spatially localized modes called scar modes. The interaction of the scar modes with gain has been recently investigated in optics in microcavity lasers and vertical-cavity surface-emitting lasers. Exploiting th...

[Phys. Rev. E 85, 047201] Published Wed Apr 18, 2012

Author(s): Kazem V. Edmond, Carolyn R. Nugent, and Eric R. Weeks

We study a dense colloidal suspension confined between two quasiparallel glass plates as a model system for a supercooled liquid in confined geometries. We directly observe the three-dimensional Brownian motion of the colloidal particles using laser scanning confocal microscopy. The particles form d...

[Phys. Rev. E 85, 041401] Published Wed Apr 11, 2012

Author(s): L. Penninck, J. Beeckman, P. De Visschere, and K. Neyts

Dye-doped cholesteric liquid crystals with a helical pitch of the order of a wavelength have a strong effect on the fluorescence properties of dye molecules. This is a promising system for realizing tunable lasers at low cost. We apply a plane wave model to simulate the spontaneous emission from a l...

[Phys. Rev. E 85, 041702] Published Mon Apr 09, 2012

Author(s): Y. Y. Ma, S. Kawata, T. P. Yu, Y. Q. Gu, Z. M. Sheng, M. Y. Yu, H. B. Zhuo, H. J. Liu, Y. Yin, K. Takahashi, X. Y. Xie, J. X. Liu, C. L. Tian, and F. Q. Shao

An electron injection regime in laser wake-field acceleration, namely electron bow-wave injection, is investigated by two- and three-dimensional particle-in-cell simulation as well as analytical model. In this regime electrons in the intense electron bow wave behind the first bubble catch up with th...

[Phys. Rev. E 85, 046403] Published Tue Apr 03, 2012

Author(s): Andrea Macchi, Amritpal Singh Nindrayog, and Francesco Pegoraro

The excitation of nonlinear electrostatic waves, such as shock and solitons, by ultraintense laser interaction with overdense plasmas and related ion acceleration are investigated by numerical simulations. Stability of solitons and formation of shock waves is strongly dependent on the velocity distr...

[Phys. Rev. E 85, 046402] Published Mon Apr 02, 2012