The almost magical world of metamaterials

Date
2008-11
Advisor
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Source Title
Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS
Print ISSN
1092-8081
Electronic ISSN
Publisher
IEEE
Volume
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Pages
73 - 74
Language
English
Type
Conference Paper
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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.

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Keywords
Metamaterials, Magnetic materials, Dielectric materials, Permittivity, Permeability, Frequency, Refractive index, Electromagnetic refraction, Composite materials, Electromagnetic propagation
Citation
Published Version (Please cite this version)