Propagation and stability of the stationary stripe nonlinear guided waves in a symmetric structure with a nonlinear film

摘要

The propagation and stability of the stationary stripe nonlinear guided waves in an ‘antiwaveguide’ symmetric layered structure containing a nonlinear film are simulated numerically. The symmetric, antisymmetric and asymmetric modes are considered, in both Kerr-law and saturable instantaneous self-focusing nonlinearity cases. The numerical calculations support the statement that stationary stripe nonlinear guided waves are always unstable on propagation for Kerr-law nonlinearities and the use of saturable nonlinear films leads to stability on propagation for effective indices corresponding to the ascending branches of the nonlinear dispersion cur