Browsing by Subject "Optical wave guides"
Now showing items 21-25 of 25
(ELSEVIER SCIENCE BV, 1996-10-01)
Open AccessThe three-waveguide nonlinear directional coupler switching characteristic is studied using the eigenmodes of the structure (i.e. supermodes). This model, which is more exact than the one used in previous works, has allowed ...
Open AccessWe demonstrate that Bound states In the Continuum (BICs) are supported in planar anisotropic structures where the optic axes are arbitrarily oriented. Moreover, we reveal fundamental new topological properties of these ...
(Universitat Politècnica de Catalunya / Universitat Autònoma de Barcelona, 2011-09-08)
Open AccessEnglish: The technique of transformation optics is applied to a system of three coupled waveguides undergoing adiabatic passage of a light beam. We show that it is possible, by applying different transformations to different ...
(American Physical Society, 2019-10-04)
Open AccessWe uncover the existence of Dirac and exceptional points in waveguides made of anisotropic materials, and study the transition between them. Dirac points in the dispersion diagram appear at propagation directions where the ...
(Optical Society of American (OSA), 2019)
Open AccessHyperbolic metamaterials (HMMs) are uniaxial materials that have hyperbolic dispersion curves. There are two types of hyperbolic metamaterials, type I that is described by a permittivity tensor with e|| < 0 and e¿ > 0, and ...