Crossover from self-defocusing to discrete trapping in nonlinear waveguide arrays.
We predict a sharp crossover from nonlinear self-defocusing to discrete self-trapping of a narrow Gaussian beam with the increase of the refractive index contrast in a periodic photonic lattice. We demonstrate experimentally nonlinear discrete localization of light with defocusing nonlinearity by single site excitation in LiNbO(3) waveguide arrays.
Matuszewski
Michal
M
Rosberg
Christian R
CR
Neshev
Dragomir N
DN
Sukhorukov
Andrey A
AA
Mitchell
Arnan
A
Trippenbach
Marek
M
Austin
Michael W
MW
Krolikowski
Wieslaw
W
Kivshar
Yuri S
YS