We analyze nonlinear guided waves in a planar waveguide made of a left-handed material surrounded by a Kerr-like nonlinear dielectric, and predict that such a waveguide can support fast and slow symmetric and antisymmetric nonlinear modes. We study the symmetry breaking bifurcation and asymmetric modes in such a symmetric structure. The analysis of nonlinear dispersion properties of the guided ...

Today, electron leakage in InP-based separate confinement laser diode has a serious effect on device performance. Control of electron leakage current is the aim of many studies in semiconductor laser industry. In this study, for the first time, a new asymmetric waveguide structure with n-interlayer for a 1.325 μm InP-based laser diode with InGaAsP multi-quantum well is proposed and theoreticall...

We analyze the existence and stability of nonlinear modes localized at phase-slip waveguide channels and their intersections in two-dimensional photonic lattices with rectangular symmetry. While in linear lattices only one localized mode of this type may exist under special conditions, nonlinearity supports a variety of localized modes including the modes which bifurcate from the symmetric stat...

The role of internal and continuum modes in the modulational instability of spatial quadratic solitons is examined by asymptotic and numerical analyses. It is shown that these modes generate novel spatially symmetric and asymmetric modulation instability branches, which underline soliton dynamics throughout a wide region of the wave-vector mismatch.

High-power microwave amplifier operation has been studied for use in a number of applications. The performance of the amplifiers has been marred, in some cases, by pulse shortening of the microwave signal. A possible source of the shortening is the loss of the beam due to hybrid HEM11 mode interaction with the beam. In this paper, we describe experiments which investigate high-power operation a...

Rotationally resolved nonresonant two-photon mass analyzed threshold ionization ~MATI! and zero kinetic energy ~ZEKE! photoelectron spectra of CH2CO 1 and CD2CO 1 are reported. The spectra are dominated by the origin band and totally symmetric a1 vibrations, n4 ~C5C symmetric stretch! and n2 ~C5O asymmetric stretch! for CH2CO , and n1 ~C5O asymmetric stretch!, n3 ~C5C symmetric stretch!, and n4...

The stability of steady, inviscid vortex pairs in equilibrium with a circular cylinder are studied by discretizing equations derived from contour dynamics. These flows were found previously using different methods in Elcrat, Fornberg, Horn & Miller (2000). There are two families of vortices, one with a pair of counter-rotating vortices standing behind the cylinder, which may be thought of as de...

The effect of the asymmetric water entry over a submerged part of a ship on the hydrodynamic impact is investigated numerically. A wedge body is considered to study and the problem is assumed to be two-dimensional. The Results of symmetric and asymmetric impacts are compared together. The effect is found significant in the numerical simulation. The maximum hydrodynamic pressure at a heel angle ...