Title :
Experimental demonstration of acoustic and electromagnetic metamaterials with conical dispersion
Author :
Jensen Li ; Zixian Liang ; Tinhua Feng ; Chi Hou Chan ; Seunghoon Han ; Sangyoon Lee
Author_Institution :
Sch. of Phys. & Astron., Univ. of Birmingham, Birmingham, UK
Abstract :
We experimentally demonstrate metamaterials with extreme dispersions by coiling up space with curled channels. An acoustic metamaterial is constructed with conical dispersion, supporting negative refraction with airborne sound. We have also demonstrated a double-negative microwave metamaterial by guiding through the cutoff-free TEM mode between two curled conducting wires. Field mappings and effective medium extraction confirm our studies.
Keywords :
acoustic metamaterials; light refraction; microwave metamaterials; optical dispersion; optical metamaterials; acoustic metamaterials; airborne sound; conical dispersion; curled channels; curled conducting wires; cutoff-free TEM mode; double-negative microwave metamaterial; effective medium extraction; electromagnetic metamaterials; extreme dispersions; field mappings; negative refraction; Acoustic beams; Acoustics; Dispersion; Electromagnetic scattering; Indexes; Metamaterials; Slabs;
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.2013.6809012
