title: Dynamic diffraction and interband transitions in two-dimensional photonic lattices.
abstract: We reveal a direct link between two fundamental wave phenomena in periodic media, Pendellösung oscillations and resonant coupling between spectral bands. We experimentally measure the power transfer between laser beams associated with the high-symmetry points in periodic and biased hexagonal photonic lattices. As a result, we demonstrate that Pendellösung oscillations dominate the dynamics of resonant interband transitions on a short propagation scale.
authors.affiliation: Nonlinear Physics Centre, Centre for Ultra-high bandwidth Devices for Optical Systems (CUDOS), Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia.
authors.forename: Bernd
authors.initials: B
authors.lastname: Terhalle
authors.forename: Anton S
authors.initials: AS
authors.lastname: Desyatnikov
authors.forename: Dragomir N
authors.initials: DN
authors.lastname: Neshev
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski
authors.forename: Cornelia
authors.initials: C
authors.lastname: Denz
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar