Experimental Observation of a Large Low-Frequency Band Gap in a Polymer Waveguide

1 University of Le Havre, Laboratoire Ondes et Milieux Complexes, UMR CNRS 6294, Le Havre, France, 2 School of Aerospace Engineering, Georgia Institute of Technology, Atlanta, GA, United States, 3 Civil, Architectural & Environmental Engineering (CAEE) Department, Drexel University, Philadelphia, PA, United States, 4 Institute of Fluid-Flow Machinery, Polish Academy of Science, Gdańsk, Poland, 5 Department of Physics and Nanostructured Interfaces and Surfaces Centre, University of Torino, Torino, Italy, 6 Laboratory of Bio-Inspired and Graphene Nanomechanics, Department of Civil, Environmental and Mechanical Engineering, University of Trento, Trento, Italy, 7 School of Engineering and Materials Science, Queen Mary University of London, London, United Kingdom, 8 Ket Laboratory, Edoardo Amaldi Foudation, Italian Space Agency, Rome, Italy