Observation of discrete quadratic surface solitons.
We report the first observation of discrete quadratic surface solitons in self-focusing and defocusing periodically poled lithium niobate waveguide arrays. By operating on either side of the phase-matching condition and using the cascading nonlinearity, both in-phase and staggered discrete surface solitons were observed. This represents the first experimental demonstration of staggered/gap surface solitons at the interface of a semi-infinite nonlinear lattice. The experimental results were found to be in good agreement with theory.
Siviloglou
Georgios A
GA
Makris
Konstantinos G
KG
Iwanow
Robert
R
Schiek
Roland
R
Christodoulides
Demetrios N
DN
Stegeman
George I
GI
Min
Yoohong
Y
Sohler
Wolfgang
W