Observation of modulational instability in discrete media with self-defocusing nonlinearity.
We report what we believe is the first observation of modulation instability in the anomalous-diffraction regions of a photonic lattice. The experiments were carried out in a 1D waveguide array fabricated in a lithium niobate crystal displaying the photovoltaic self-defocusing nonlinearity, and our results are confirmed numerically by simulating the nonlinear beam propagation.
Stepić
Milutin
M
Institute of Physics and Physical Technology, Clausthal University of Technology, Clausthal-Zellerfeld, Germany. milutin.stepic@tuclausthal.de
Wirth
Christian
C
Rüter
Christian E
CE
Kip
Detlef
D