Title :
Omnidirectional broadband flexural focusing structure
Author :
Climente, A. ; Torrent, D. ; Sanchez-Dehesa, J.
Author_Institution :
Wave Phenomena Group, Univ. Politec. de Valencia, Valencia, Spain
Abstract :
We present the proposal and the theoretical characterization of the elastic analog of the so called photonic black-hole. The structure has a cylindrical symmetry and consists of two parts, a shell that bends the flexural waves and a core where the energy concentrates. The shell behaves like a gradient index lens and the variation of the refractive index has been obtained by changing the thickness of the plate. The simulations based on a multiple scattering algorithm demonstrate the broadband and omnidirectional properties of the structure.
Keywords :
gradient index optics; lenses; light scattering; optical focusing; optical materials; refractive index; core; cylindrical symmetry; elastic analog; energy concentration; flexural waves; gradient index lens; multiple scattering algorithm; omnidirectional broadband flexural focusing structure; photonic black-hole; plate thickness; refractive index variation; structure broadband properties; structure omnidirectional properties; Acoustics; Broadband communication; Electromagnetics; Indexes; Metamaterials; Refractive index;
Conference_Titel :
Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2013 7th International Congress on
Conference_Location :
Talence
Print_ISBN :
978-1-4799-1229-2
DOI :
10.1109/MetaMaterials.2013.6809041
