title: Localization and oscillation of optical beams in Moiré lattices.
abstract: We study the propagation of optical beams in two-dimensional Moiré lattices, and demonstrate position-dependent beam dynamics when a quasi-Bragg condition is satisfied. We show that when the optical beam is incident to a peak of the lattice envelop, an optical Zitterbewegung is obtained. If the optical beam is incident to a node of the envelop, a field localization effect takes place. The localized beam oscillates with a much larger spatial period than that of the optical Zitterbewegung. Variation of the oscillation period versus the split in periods is discussed. The position-dependent beam dynamics are explained by the excitation of proper bandedge eigenmodes of the Moiré lattice, and can be engineered via tuning the periods of the two superimposed Bragg lattices.
authors.forename: Rui-Dong
authors.initials: RD
authors.lastname: Xue
authors.forename: Wei
authors.initials: W
authors.lastname: Wang
authors.forename: Lu-Qi
authors.initials: LQ
authors.lastname: Wang
authors.forename: Hao-Lin
authors.initials: HL
authors.lastname: Chen
authors.forename: Rui-Peng
authors.initials: RP
authors.lastname: Guo
authors.forename: Jing
authors.initials: J
authors.lastname: Chen