title: Localized and nonspreading spatiotemporal Wannier wave packets in photonic crystals.
abstract: A general analysis of undistorted propagation of localized wave packets in photonic crystals based on a Wannier-function expansion technique is presented. Different kinds of propagating and stationary spatiotemporal localized waves are found from an asymptotic analysis of the Wannier function envelope equation.
authors.affiliation: Dipartimento di Fisica, Istituto di Fotonica e Nanotecnologie del CNR, Politecnico di Milano, Piazza L. da Vinci 32, I-20133 Milan, Italy.
authors.forename: Stefano
authors.initials: S
authors.lastname: Longhi