Nonlinear Bloch modes in two-dimensional photonic lattices

Traeger, Denis; Fischer, Robert; Neshev, Dragomir N.; Sukhorukov, Andrey A.; Denz, Cornelia; Krolikowski, Wieslaw; Kivshar, Yuri S.

Nonlinear Bloch modes in two-dimensional photonic lattices

Authors

Traeger, Denis

Fischer, Robert

Neshev, Dragomir N.

Sukhorukov, Andrey A.

Denz, Cornelia

Krolikowski, Wieslaw

Kivshar, Yuri S.

Description

We generate experimentally different types of two-dimensional Bloch waves of a square photonic lattice by employing the phase imprinting technique. We probe the local dispersion of the Bloch modes in the photonic lattice by analyzing the linear diffraction of beams associated with the high-symmetry points of the Brillouin zone, and also distinguish the regimes of normal, anomalous, and anisotropic diffraction through observations of nonlinear self-action effects.
11 pages, 8 figures