U. Peschel et al., SWITCHING DYNAMICS OF THE REFLECTED FIELD IN A NONLINEAR GRATING COUPLER, Journal of the Optical Society of America. B, Optical physics, 12(7), 1995, pp. 1249-1258
Using a modal theory, we study the dynamics of a two-dimensional finit
e beam reflected by a nonlinear grating coupler. Different algorithms
are proposed to calculate the linear as well as the nonlinear coupling
coefficients. We show that this nonlinear grating coupler can be opti
mized with respect to switching contrast and power. We compare our res
ults with the experimentally determined switching behavior of a silico
n-on-sapphire coupler and study its application as a fast saturable ab
sorber.