We have investigated the modulation instability (MI) in a nonlinear optical coupler using a
generalized model describing the pulse propagation of a waveguiding structure composed …

We investigate modulation instability (MI) in a nonlinear oppositely directed coupler with a
quadratic nonlinearity, where one channel is made from a positive-index material (PIM) and …

We consider a nonlinear oppositely direct coupler with a negative-index metamaterial
channel and a modified Kerr-type saturable nonlinearity (MSN). We presented an analytical …

The dispersion relation and modulation instability (MI) of an array of alternating positive-
index material (PIM) and negative-index material (NIM) waveguides are investigated. It is …

We report the optical bistability in two core oppositely directed coupler with negative index
material channel. Using Langrangian variational method and Jacobi elliptic functions, we …

The parametric interaction of electromagnetic waves in a medium with a negative index of
refraction is considered. Two cases of Kerr and quadratic nonlinearities are investigated …

Backward waves exist in electric transmission lines, in a reaction-diffusion medium and in
acoustics. Propagation of the electromagnetic pulses in magnetic metamaterial has been …

We report the influence of higher order nonlinearity on dispersion relation and multistability
in oppositely directed coupler with negative index material channel. The study shows that …

We consider the coupled electromagnetic waves propagating in a nonlinear coupler and in
nonlinear waveguide array, which consists of alternating waveguides of positive and …

The emergence of metamaterials (MMs) provides new ways to overcome the limitations of
modern optics, materials science, and their applications. An important property of negative …