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

fYear

2013

fDate

16-21 Sept. 2013

Firstpage

238

Lastpage

240

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/MetaMaterials.2013.6809012

Filename

6809012