The almost magical world of metamaterials
Author
Özbay, Ekmel
Date
2008-11Source Title
Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Print ISSN
1092-8081
Publisher
IEEE
Pages
73 - 74
Language
English
Type
Conference PaperItem Usage Stats
156
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Abstract
In recent years, there has been a burgeoning interest in rapidly growing field of metamaterials due to their unprecedented properties unattainable from ordinary materials. Veselago pointed out that a material exhibiting negative values of dielectric permittivity (epsiv) and magnetic permeability (mu) would have a negative refractive index [1]. Generally speaking, the dielectric permittivity (epsiv) and the magnetic permeability (mu) are both positive for natural materials. In fact, it is possible to obtain negative values for epsiv and mu by utilizing proper designs of metamaterials. Left-handed electromagnetism and negative refraction are achievable with artificially structured metamaterials exhibiting negative values of permittivity and permeability simultaneously at a certain frequency region. The first steps to realize these novel type of materials were taken by Smith et al., where they were able to observe a left-handed propagation band at frequencies where both dielectric permittivity and magnetic permeability of the composite metamaterial are negative [2]. Soon after, left-handed metamaterials with an effective negative index of refraction are successfully demonstrated by various groups.
Keywords
MetamaterialsMagnetic materials
Dielectric materials
Permittivity
Permeability
Frequency
Refractive index
Electromagnetic refraction
Composite materials
Electromagnetic propagation