In this contribution, we experimentally demonstrate a new type of spatial solitons arising from the mutual
interaction of multiple two-dimensional Airy beams in a photorefractive nonlinear refractive index medium.
Thereby, we combine two important concepts of optics: the fascinating accelerated Airy beams and nonlinear
beam localization such as spatial soliton formation. We investigate the generation of this novel type of solitons
and soliton pairs with respect to the number and phase relation of the superimposed Airy beams and support
all experiments with comprehensive numerical simulations.
Light propagation in structured photonic media covers many fascinating wave phenomena resulting from the
band structure of the underlying lattice. Recently, the focus turned towards deterministic aperiodic structures
exhibiting distinctive band gap properties. To experimentally study these effects, optical induction of photonic
refractive index landscapes turned out to be the method of choice to fabricate these structures. In this contribution,
we present a paradigm change of photonic lattice design by introducing a holographic optical induction
method based on pixel-like spatially multiplexed single-site nondiffracting Bessel beams. This technique allows
realizing a huge class of two-dimensional photonic structures, including deterministic aperiodic golden-angle
Vogel spirals, as well as Fibonacci lattices.
We show both experimentally and numerically, control over the acceleration of two-dimensional Airy beam propagating
in optically induced photonic lattice. Varying the lattice strength and including various defects we can reach a state,
where the acceleration is completely stopped. We find an additional class of discrete lattice beams, localized and defect
modes observed with Airy beams propagating in diamond optically induced photonic lattice.