Experimental observation of drumhead surface states in SrAs3

Photonic crystals possessing multiple Weyl points and the experimental observation of robust surface states

Weyl points, as monopoles of Berry curvature in momentum space, have captured much attention recently in various branches of physics. Realizing topological materials that exhibit such nodal points is challenging and indeed, Weyl points have been found experimentally in transition metal arsenide and phosphide and gyroid photonic crystal whose structure is complex. If realizing even the simplest ...

Experimental observation of optical bound states in the continuum.

We present the experimental observation of bound states in the continuum. Our experiments are carried out in an optical waveguide array structure, where the bound state (guided mode) is decoupled from the continuum by virtue of symmetry only. We demonstrate that breaking the symmetry of the system couples this special bound state to continuum states, leading to radiative losses. These experimen...

Experimental observation of dark solitons on water surface

A. Chabchoub1,∗, O. Kimmoun, H. Branger, N. Hoffmann, D. Proment, M. Onorato, and N. Akhmediev 1 Mechanics and Ocean Engineering, Hamburg University of Technology, 21073 Hamburg, Germany∗ 2 École Centrale Marseille, 13013 Marseille, France 3 IRPHE, UMR 7342, CNRS, AMU Aix Marseille Université, 13013 Marseille, France 4 Dipartimento di Fisica, Università degli Studi di Torino, Torino 10125, Ital...

Experimental Observation of Bohr’s Nonlinear Fluidic Surface Oscillation

Niels Bohr in the early stage of his career developed a nonlinear theory of fluidic surface oscillation in order to study surface tension of liquids. His theory includes the nonlinear interaction between multipolar surface oscillation modes, surpassing the linear theory of Rayleigh and Lamb. It predicts a specific normalized magnitude of 0.416η(2) for an octapolar component, nonlinearly induced...

Experimental Observation of Surface and Interface Modes by Light Scattering