Gray and dark spatial solitary waves in Left handed waveguide structure

Abstract

The propagation characteristics of both TE gray and dark solitary waves in a waveguide structure consisting of left handed material LH film sandwiched in a nonlinear defocusing medium is investigated. In (LH) film both permittivity and magnetic permeability are negative in definite frequency range. We study dispersion and grayness properties of the solitary waves. We found that the implementation of the left handed material stimulate the backward traveling of the waves with high intensity at the film boundaries. We also found that higher values of wave's grayness are obtained for relatively small magnetic permeability of LH film. These results may be used in designing microwave-photonic devices which have found increasing use in information and telecommunication technologies,