We demonstrate coherent interactions between spatial gap solitons in optically induced photonic lattices. Because of the “staggered” phase structures, two in-phase (out-of-phase) bright gap solitons can repel (attract) each other at close proximity, in contrast to soliton interaction in homogeneous media. A reversal of energy transfer direction and a transition between attractive and repulsive interaction forces can be obtained solely by changing the initial soliton separation relative to the lattice spacing.
© 2011 Optical Society of America
Original Manuscript: January 14, 2011
Manuscript Accepted: February 21, 2011
Published: March 25, 2011
Sheng Liu, Yi Hu, Peng Zhang, Xuetao Gan, Fajun Xiao, Cibo Lou, Daohong Song, Jianlin Zhao, Jingjun Xu, and Zhigang Chen, "Anomalous interactions of spatial gap solitons in optically induced photonic lattices," Opt. Lett. 36, 1167-1169 (2011)