Dichromatic nonlinear eigenmodes in slab waveguide with chi(2) nonlinearity.
The existence of purely nonlinear eigenmodes in a waveguiding structure composed of a slab with quadratic nonlinearity surrounded by (non)linear claddings is reported. Modes having bright and dark solitonlike shapes and consisting of two mutually locked harmonics are identified. Asymmetrical modes are shown to exist in symmetrical environments. Constraints for the existence of the modes are derived in terms of parameters of guiding structure materials.
Darmanyan
S A
SA
Institute of Spectroscopy, Russian Academy of Sciences, 142092 Troitsk, Russia.
Nevière
M
M