TY - JOUR
T1 - Effect of nonlinearity on dynamic diffraction and interband coupling in two-dimensional hexagonal photonic lattices
AU - Terhalle, Bernd
AU - Desyatnikov, Anton S.
AU - Neshev, Dragomir N.
AU - Krolikowski, Wieslaw
AU - Denz, Cornelia
AU - Kivshar, Yuri S.
PY - 2012/7/16
Y1 - 2012/7/16
N2 - We explore experimentally the effect of nonlinearity on resonant coupling between high-symmetry momentum states in hexagonal photonic lattices. We observe nonlinear Pendellösung oscillations with the power-dependent excitation of additional critical points of the same symmetry in the reciprocal cells closest to the excitation point. In contrast, the nonlinear Landau-Zener tunneling in biased lattices exhibits a sharp transition to the modulational instability with an increase of the input optical power.
AB - We explore experimentally the effect of nonlinearity on resonant coupling between high-symmetry momentum states in hexagonal photonic lattices. We observe nonlinear Pendellösung oscillations with the power-dependent excitation of additional critical points of the same symmetry in the reciprocal cells closest to the excitation point. In contrast, the nonlinear Landau-Zener tunneling in biased lattices exhibits a sharp transition to the modulational instability with an increase of the input optical power.
UR - http://www.scopus.com/inward/record.url?scp=84864267862&partnerID=8YFLogxK
U2 - 10.1103/PhysRevA.86.013821
DO - 10.1103/PhysRevA.86.013821
M3 - Article
SN - 1050-2947
VL - 86
JO - Physical Review A - Atomic, Molecular, and Optical Physics
JF - Physical Review A - Atomic, Molecular, and Optical Physics
IS - 1
M1 - 013821
ER -