Optically induced transition between discrete and gap solitons in a nonconventionally biased photorefractive crystal.
We show that optically induced photonic lattices in a nonconventionally biased photorefractive crystal can support the formation of discrete and gap solitons owing to a mechanism that differs from the conventional screening effect. Both the bias direction and the lattice orientation can dramatically influence the nonlinear beam-propagation dynamics. We demonstrate a transition from self-focusing to -defocusing and from discrete to gap solitons solely by adjusting the optical-beam orientation.
Zhang
Peng
P
Institute of Optical Information Science and Technology and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, Xi'an 710072, China.
Liu
Sheng
S
Zhao
Jianlin
J
Lou
Cibo
C
Xu
Jingjun
J
Chen
Zhigang
Z