Discrete interband mutual focusing in nonlinear photonic lattices.
We study nonlinear coupling of mutually incoherent beams associated with different Floquet-Bloch waves in a one-dimensional optically-induced photonic lattice. We demonstrate experimentally how such interactions lead to asymmetric mutual focusing and, for waves with opposite diffraction properties, to simultaneous focusing and defocusing as well as discreteness-induced beam localization and reshaping effects.
Rosberg
Christian
C
Hanna
Brendan
B
Neshev
Dragomir
D
Sukhorukov
Andrey
A
Krolikowski
Wieslaw
W
Kivshar
Yuri
Y