Saddle solitons: a balance between bi-diffraction and hybrid nonlinearity.
We demonstrate self-trapping of light by simultaneously compensating normal and anomalous (saddle-shaped) diffractions with self-focusing and self-defocusing hybrid nonlinearity in optically induced ionic-type photonic lattices. Innovative two-dimensional gap solitons, named "saddle solitons," are established, whose phase and spectrum characteristics are different from all previously observed spatial solitons.
Hu
Yi
Y
The Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education and TEDA Applied Physics School, Nankai University, Tianjin 300457, China.
Lou
Cibo
C
Zhang
Peng
P
Xu
Jingjun
J
Yang
Jianke
J
Chen
Zhigang
Z