Title :
Flexible metamaterial using subwavelength holes arrays for absorption at THz frequencies
Author :
Soltani, Nahid ; Lheurette, E. ; Ducournau, Guillaume ; Lippens, Didier
Author_Institution :
IEMN, Univ. de Lille 1, Villeneuve-d´Ascq, France
Abstract :
This study deals with metamaterial design for THz electromagnetic wave absorption. The structure is based on subwavelength holes arrays separated by a Polyethylene-Naphtalate (PEN) soft substrate whose complex permittivity has been experimentally determined by means of Vectorial Network Analysis in the 325-500 GHz frequency band. The principle of this absorbing layer is related to an asymmetry between the elliptical aspect ratio (EAR) of the top and the bottom metallic layer apertures which leads to an efficient absorption by reducing both transmission and reflection coefficients values.
Keywords :
light absorption; light reflection; light transmission; optical arrays; optical design techniques; optical metamaterials; optical polymers; permittivity; terahertz wave spectra; EAR; PEN; Polyethylene-Naphtalate soft substrate; THz electromagnetic wave absorption; THz frequencies; Vectorial Network Analysis; absorbing layer; bottom metallic layer apertures; complex permittivity; efficient absorption; elliptical aspect ratio; flexible metamaterial; frequency 325 GHz to 500 GHz; metamaterial design; reflection coefficient values; subwavelength hole arrays; top metallic layer apertures; transmission coefficient values; Absorption; Apertures; Ear; Electromagnetics; Metamaterials; Reflection coefficient; Substrates;
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.2013.6809024
