Orientation-dependent excitations of lattice soliton trains with hybrid nonlinearity

Opt Lett. 2009 Apr 1;34(7):1114-6. doi: 10.1364/ol.34.001114.

Abstract

We demonstrate selective excitation of soliton trains residing in different gaps or within the same Bloch band of a new type of photonic lattice merely by changing the orientation of an input probe beam. A self-focusing and -defocusing hybrid nonlinearity as established in a nonconventionally biased photorefractive crystal leads to controlled soliton transitions from different band edges or subband edges, in good agreement with our theoretical analysis.