title: Simultaneous bandgaps in LiNbO3 phoxonic crystal slab.
abstract: We study simultaneous photonic and phononic crystal slabs created in Z-cut lithium niobate membranes. Bandgaps for guided waves are identified using the three-dimensional finite element method (FEM). Three lattices are considered: the square, the hexagonal, and the honeycomb lattices. We investigate the evolution of band gaps as a function of geometrical parameters such as hole radius and membrane thickness. We show the existence of dual photonic and phononic bandgaps in the triangular lattice for suitable geometrical parameters and specific modal symmetries for both the elastic and the electromagnetic fields.
authors: Quentin
authors: Q
authors: Rolland
authors: Samuel
authors: S
authors: Dupont
authors: Joseph
authors: J
authors: Gazalet
authors: Jean-Claude
authors: JC
authors: Kastelik
authors: Yan
authors: Y
authors: Pennec
authors: Bahram
authors: B
authors: Djafari-Rouhani
authors: Vincent
authors: V
authors: Laude