Title :
Terahertz plasmonic random metamaterial
Author :
Elezzabi, A.Y. ; Chau, K.J. ; Maraghechi, P. ; Baron, C.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, AB
Abstract :
We explore the terahertz electromagnetic properties of a composite metamaterial consisting of subwavelength-sized dielectric particles with metallic inclusions. We observe group refractive index exhibits atypical which cannot be explained by conventional effective medium theory. It is shown to arise from near-field particle-plasmon coupling between the metallic particles. Moreover, we provide evidence of electron spin-dependent terahertz plasmonic transport through both ferromagnetic and ferromagnetic/nonmagnetic metamaterials.
Keywords :
cobalt; composite materials; electromagnetism; ferromagnetic materials; metamaterials; plasmonics; plasmons; refractive index; sapphire; terahertz spectroscopy; time-domain analysis; Co-Al2O3; composite metamaterials; conventional effective medium theory; electron spin-dependent terahertz plasmonic transport; ferromagnetic metamaterials; ferromagnetic-nonmagnetic metamaterials; metallic inclusions; metallic particles; near-field particle-plasmon coupling; refractive index; subwavelength-sized dielectric particles; terahertz electromagnetic properties; terahertz plasmonic random metamaterial; terahertz time-domain spectroscopy; Dielectrics; Electromagnetic radiation; Electrons; Magnetic materials; Metamaterials; Optical attenuators; Optical refraction; Optical variables control; Plasmons; Refractive index;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves, 2008. IRMMW-THz 2008. 33rd International Conference on
Conference_Location :
Pasadena, CA
Print_ISBN :
978-1-4244-2119-0
Electronic_ISBN :
978-1-4244-2120-6
DOI :
10.1109/ICIMW.2008.4665496
