title: Gouy phase of optical beams in anisotropic indefinite metamaterials.
abstract: The Gouy phase shift of optical beams in anisotropic indefinite metamaterials displays extraordinary characteristics because of the presence of anisotropic magnetic and electric responses. We propose a simple interpretation of these characteristics from the unusual dispersion relation of the optical waves in the metamaterials, which influences the expectation value of the axial propagation constant of the focused beam.
authors.affiliation: MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics, Nankai University, Tianjin 300071, China.
authors.forename: Hai-Xu
authors.initials: HX
authors.lastname: Cui
authors.forename: Fan
authors.initials: F
authors.lastname: Ye
authors.forename: Teng-Fei
authors.initials: TF
authors.lastname: Li
authors.forename: Qing-Hua
authors.initials: QH
authors.lastname: Guo
authors.forename: Jing
authors.initials: J
authors.lastname: Chen