title: Observation of transverse instabilities in optically induced lattices.
abstract: We study experimentally the Bloch-wave instabilities in optically induced photonic lattices. We reveal two different instability scenarios associated with either the transverse modulational instability of a single Bloch wave or the nonlinear interband coupling between different Bloch waves. We show that the transverse instability is greatly enhanced in the induced lattice in comparison with homogeneous media.
authors.affiliation: Nonlinear Physics Group and Centre for Ultrahigh-bandwidth Devices for Optical Systems, Research School of Physical Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia. dnn124@rsphysse.anu.edu.au
authors.forename: Dragomir
authors.initials: D
authors.lastname: Neshev
authors.forename: Andrey A
authors.initials: AA
authors.lastname: Sukhorukov
authors.forename: Yuri S
authors.initials: YS
authors.lastname: Kivshar
authors.forename: Wieslaw
authors.initials: W
authors.lastname: Krolikowski