title: Multifrequency gap solitons in nonlinear photonic crystals.
abstract: We predict the existence of multifrequency gap solitons (MFGSs) in both one- and two-dimensional nonlinear photonic crystals. A MFGS is a single intrinsic mode possessing multiple frequencies inside the gap. Its existence is a result of synergic nonlinear coupling among solitons or soliton trains at different frequencies. Its formation can either lower the threshold fields of the respective frequency components or stabilize their excitations. These MFGSs form a new class of stable gap solitons.
authors.affiliation: Department of Physics and Institute of Nano Science and Technology (INST), The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Xie
authors.forename: Zhao-Qing
authors.initials: ZQ
authors.lastname: Zhang