Title :
Artificial magnetism and backward waves in terahertz regime from arrays of resonant TiO2 spheres
Author :
Lannebère, S. ; Vigneras, V. ; Aradian, A.
Author_Institution :
Centre de Rech. Paul Pascal (CRPP), Univ. Bordeaux I, Pessac, France
Abstract :
We investigate the design of artificial (negative) permeability and backward-wave metamaterials in the terahertz range from arrays of dielectric TiO2 spheres embedded in a host medium. Artificial magnetism arising from arrays of such spheres, is studied both analytically and numerically. We also show that, due to interparticle coupling, bidisperse arrays of real material spheres in the terahertz are unable to provide double-negativity. However, we find that a new physical mechanism takes over and that there are bands of backward waves (despite a positive refractive index) that appear both in bidisperse and monodisperse arrays.
Keywords :
magnetic permeability; metamaterials; terahertz materials; titanium compounds; artificial magnetism; backward wave metamaterials; bidisperse arrays; interparticle coupling; monodisperse arrays; negative permeability; resonant spheres; terahertz regime; Couplings; Magnetic domains; Magnetic materials; Magnetic resonance; Metamaterials; Permeability;
Conference_Titel :
Microwave Conference (EuMC), 2011 41st European
Conference_Location :
Manchester
Print_ISBN :
978-1-61284-235-6