The effect of phase-matched third-harmonic generation on the structure and stability of spatial solitary waves is investigated. A power threshold for the existence of two-frequency spatial solitons is found, and the multistability of solitary waves in a Kerr medium owing to a higher-order nonlinear phase shift caused by cascaded third-order processes is revealed.

We observe the dynamics of waves propagating on the surface of a ferrofluid under the influence of a spatially and temporally modulated field. In particular, we excite plane waves by applying a traveling lamellar modulation of the magnetization. By means of this external driving, both the wavelength and the propagation velocity of the waves can be controlled. The amplitude of the excited waves ...

The process of optical frequency doubling can lead, in the undepleted regime, to the generation of a X-wave envelope with group velocity locked to the pump beam. Its parameters and its angular spectrum, are directly related to the zeroand first-order dispersive features of the nonlinear process. This constitutes a novel mechanism for spatio-temporal localization of light. Electronic address: c....

Objective: To investigate the effect of voids on propagation plane waves in a generalized thermo-elastic solid. Method: The method harmonic solution is employed to solve basic equations void solids. Findings: Under and non-voids, three sets longitudinal are derived, they not appeared any classical theory elasticity. But one transverse wave derived these results coinciding with Novelty: MATLAB p...

M. S. Mills,1,* G. A. Siviloglou,2 N. Efremidis,3 T. Graf,4 E. M. Wright,4 J. V. Moloney,4 and D. N. Christodoulides1 1CREOL School of Optics, University of Central Florida, Orlando, Florida 32816, USA 2MIT-Harvard Center for Ultracold Atoms, Research Laboratory of Electronics, and Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA 3Department of A...