title: Group-velocity-matched multistep cascading in nonlinear photonic crystals.
abstract: We demonstrate that simultaneous phase- and group-velocity-matched cascaded parametric processes can be achieved in two-dimensional quadratic nonlinear photonic crystals by proper matching of noncollinear processes with front tilting of the fundamental pulse. We present examples of cascaded third- and fourth-harmonic generation in a poled LiNbO3 planar structure.
authors.affiliation: Nonlinear Physics Center and Centre for Ultra-high bandwidth Devices for Optical Systems, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT.
authors.forename: Solomon M
authors.initials: SM
authors.lastname: Saltiel
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar