Now showing items 1-2 of 2

  • Direct observation of negative-index microwave surface waves. 

    Dockrey, JA; Horsley, SA; Hooper, Ian R.; Sambles, JR; Hibbins, Alastair P. (Nature Publishing Group: Open Access Journals - Option C, 2016-02-23)
    Waves propagating in a negative-index material have wave-front propagation (wavevector, k) opposite in direction to that of energy flow (Poynting vector, S). Here we present an experimental realisation at microwave frequencies ...
  • Topological Modes in One Dimensional Solids and Photonic Crystals 

    Atherton, TJ; Butler, CAM; Taylor, MC; Hooper, Ian R.; Hibbins, Alastair P.; Sambles, JR; Mathur, H (American Physical Society, 2016-03-02)
    It is shown theoretically that a one-dimensional crystal with time reversal symmetry is characterized by a Z_{2} topological invariant that predicts the existence or otherwise of edge states. This is confirmed experimentally ...