title: Optical Bloch oscillations of an Airy beam in a photonic lattice with a linear transverse index gradient.
abstract: We theoretically report the existence of optical Bloch oscillations (BO) of an Airy beam in a one-dimensional optically induced photonic lattice with a linear transverse index gradient. The Airy beam experiencing optical BO shows a more robust non-diffracting feature than its counterparts in free space or in a uniform photonic lattice. Interestingly, a periodical recurrence of Airy shape accompanied with constant alternation of its acceleration direction is also found during the BO. Furthermore, we demonstrate that the period and amplitude of BO of an Airy beam can be readily controlled over a wide range by varying the index gradient and/or the lattice period. Exploiting these features, we propose a scheme to rout an Airy beam to a predefined output channel without losing its characteristics by longitudinally modulating the transverse index gradient.
authors.forename: Fajun
authors.initials: F
authors.lastname: Xiao
authors.forename: Baoran
authors.initials: B
authors.lastname: Li
authors.forename: Meirong
authors.initials: M
authors.lastname: Wang
authors.forename: Weiren
authors.initials: W
authors.lastname: Zhu
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang
authors.forename: Sheng
authors.initials: S
authors.lastname: Liu
authors.forename: Malin
authors.initials: M
authors.lastname: Premaratne
authors.forename: Jianlin
authors.initials: J
authors.lastname: Zhao
mesh_terms: D003198:Computer Simulation; D005740:Gases / Q000032:analysis*; D008027:Light; D008962:Models, Theoretical; D055095:Optics and Photonics / Q000295:instrumentation*; D017785:Photons; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation
chemical_list: D005740:Gases