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|Title||STABILITY OF NON LINEAR TE SURFACE WAVES ALONG THE INTERFACE OF NONLINEAR DIELECTRIC AND (LANS) SUPERLATTICES MEDIA|
The stability characteristics of non-linear surface waves propagating at a lateral antiferromagnetic non magnetic superlattices (LANS) substrate and a non-linear dielectric cover have been simulated numerically by using the perturbation method . LANS are linear frequency- dependent gyromagnetic media, described with an effective- medium theory . The growth rate of perturbation is computed by solving the dispersion equation of perturbation. We found that the nonlinear surface waves are unstable because their growth rate of perturbation δ is real with the existence of the magnetic matter of permeability tensor μ e . This means that the stability of nonlinear surface waves is magnetic fractional dependent. The variation of the nonlinear surface waves energy flow [2,3] along the propagation axis as a function of the effective index x n for different values of the saturation parameter p μ has been studied. It illustrates that the energy of the non-linear surface waves increases with increasing p μ . The spatial evolution  of the steady state field amplitude is determined by using computer simulation method [5,6]. The calculation shows that with increasing the x n at fixed p μ , the field distribution is sharpened and concentrated in the non linear medium.
|Published in||IUG Journal for Natural Studies|
|Series||Volume: 14, Number: 1|
|Publisher||الجامعة الإسلامية - غزة|
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