title: Multi-directional Čerenkov second harmonic generation in two-dimensional nonlinear photonic crystal.
abstract: We study Čerenkov-type second-harmonic generation in a two-dimensional quasi-periodically poled LiNbO3 crystal. We employ a new geometry of interaction to observe simultaneous emission of multi-directional nonlinear Čerenkov radiation with comparable intensities. This opens a way to control the angle of Čerenkov emission by tailoring the nonlinearity of the material, which is otherwise intrinsically defined by dielectric constants of the medium and their dispersion.
authors.affiliation: Laser Physics Center, Research School of Physics and Engineering, Australian National University, ACT 0200, Australia. ysh111@physics.anu.edu.au
authors.forename: Yan
authors.initials: Y
authors.lastname: Sheng
authors.forename: Vito
authors.initials: V
authors.lastname: Roppo
authors.forename: Mingliang
authors.initials: M
authors.lastname: Ren
authors.forename: Ksawery
authors.initials: K
authors.lastname: Kalinowski
authors.forename: Crina
authors.initials: C
authors.lastname: Cojocaru
authors.forename: Jose
authors.initials: J
authors.lastname: Trull
authors.forename: Zhiyuan
authors.initials: Z
authors.lastname: Li
authors.forename: Kaloian
authors.initials: K
authors.lastname: Koynov
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski