Brewster solitons and omnidirectional solitons in one-dimensional optical structures involving Kerr-type nonlinear materials

Abstract: The possibility of exciting stationary solitons due to the Brewster effect is investigated. The analysis is performed by computing the transmission coefficient of an electromagnetic monochromatic wave obliquely incident on the optical system and linearly polarized with the transverse-electric polarization. The optical system is supposed to be surrounded by a vacuum. Two different optical systems are studied. First, the system under consideration is assumed to be composed of the junction of a single dispersive layer with a linear electromagnetic response and a single nonlinear layer exhibiting Kerr nonlinearity. The obtained results suggest the excitation of stationary solitons in the nonlinear layer induced by the occurrence of the Brewster phenomenon in the linear medium. The second system is considered as a single Kerr nonlinear layer. The Brewster effect is observed for both self-focusing and self-defocusing nonlinearities, which leads to the excitation of soliton states within the nonlinear layer. The Brewster-angle dependence of the intensity of the incident electromagnetic wave is also shown. Finally, the excitation of omnidirectional solitons in the case of single nonlinear layers is discussed. It is shown that matching the magnetic permeability of the surrounding medium and the nonlinear layer leads to maximum transmission states, independent of the incidence angle, for the input-intensity value that causes the homogenization of the electric permittivity.