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Physics and Applications of Metamaterials
Metamaterials are artificially structured composite materials that show negative effective
refractive index over certain frequency bands. This has led to novel control over
electromagnetic wave propagation. This paper extends a preliminary lecture presented
at a Conference (Emerging Trends in Non-Conventional Energy Recourses(ETNCER-
16), 2016) by comprehensively examining the fundamental physics behind metamaterials
and also the history of the development. A brief summary of exotic properties of metamaterials
is also presented. The underlying mechanisms of negative permittivity and
permeability are explained. Various remarkable phenomena such as perfect lensing, electromagnetic
cloaking, and reversed electromagnetic effects are also discussed here in a
pedagogically relevant manner. Their emerging applications are also briefly reviewed
here, with particular emphasis on their applications in energy harvesting, wireless power
transmission, cloaking and thermophotovoltaic energy conversion.
- Isht Vibhu, Vishal Singh Chandel *