%0 Journal Article %T Generalized Analytical Solutions for Nonlinear Positive-Negative Index Couplers %A Zh. Kudyshev %A G. Venugopal %A N. M. Litchinitser %J Physics Research International %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/945807 %X We find and analyze a generalized analytical solution for nonlinear wave propagation in waveguide couplers with opposite signs of the linear refractive index, nonzero phase mismatch between the channels, and arbitrary nonlinear coefficients. %U http://www.hindawi.com/journals/phys/2012/945807/