Journal ArticleDOI
Negative refraction of modulated electromagnetic waves
TLDR
In this article, it was shown that a modulated Gaussian beam undergoes negative refraction at the interface between a positive and negative refractive index material, and the interference fronts appear to bend in a manner suggesting positive refraction, such that the true direction of the energy flow associated with the refracted beam is not obvious.Abstract:
We show that a modulated Gaussian beam undergoes negative refraction at the interface between a positive and negative refractive index material. While the refraction of the beam is clearly negative, the modulation interference fronts are not normal to the group velocity, and thus exhibit a sideways motion relative to the beam—an effect due to the inherent frequency dispersion associated with the negative index medium. In particular, the interference fronts appear to bend in a manner suggesting positive refraction, such that for a plane wave, the true direction of the energy flow associated with the refracted beam is not obvious.read more
Citations
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Journal ArticleDOI
Metamaterials and negative refractive index.
TL;DR: Recent advances in metamaterials research are described and the potential that these materials may hold for realizing new and seemingly exotic electromagnetic phenomena is discussed.
Journal ArticleDOI
Physics of negative refractive index materials
TL;DR: In this paper, the authors review the fundamental concepts and ideas of negative refractive index materials and present the ideas of meta-materials that enable the design of new materials with a negative dielectric permittivity, negative magnetic permeability, and negative fringes.
Journal ArticleDOI
Pairing an epsilon-negative slab with a mu-negative slab: resonance, tunneling and transparency
Andrea Alù,Nader Engheta +1 more
TL;DR: In this article, the authors analyzed the transverse-magnetic (TM) wave interaction with a pair of slabs, one being an epsilon negative (ENG) layer in which the real part of permittivity is assumed to be negative while its permeability has positive real part, and the other being a mu-negative (MNG) layer that has the real parts of its permittability negative but its permitivity has positivereal part.
Journal ArticleDOI
A positive future for double-negative metamaterials
TL;DR: In this article, the authors highlight a large variety of physical effects associated with double and single negative metamaterials and some of their very interesting potential applications, including the potential to engineer materials with desired electric and magnetic properties to achieve unusual physical effects.
Journal ArticleDOI
Subwavelength imaging in photonic crystals
TL;DR: In this paper, the authors investigate the transmission of evanescent waves through a slab of photonic crystal and explore the recently suggested possibility of focusing light with subwavelength resolution, and they find that the periodicity of the photonic lattice imposes an upper cutoff to the transverse wave vector of evanecent waves that can be amplified, and thus a photonic-crystal superlens is free of divergences even in the lossless case.
References
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Book
Principles of Optics
TL;DR: In this paper, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Principles of Optics
TL;DR: In this article, the authors discuss various topics about optics, such as geometrical theories, image forming instruments, and optics of metals and crystals, including interference, interferometers, and diffraction.
Journal ArticleDOI
Negative Refraction Makes a Perfect Lens
TL;DR: The authors' simulations show that a version of the lens operating at the frequency of visible light can be realized in the form of a thin slab of silver, which resolves objects only a few nanometers across.
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The Electrodynamics of Substances with Simultaneously Negative Values of ∊ and μ
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Experimental Verification of a Negative Index of Refraction
TL;DR: These experiments directly confirm the predictions of Maxwell's equations that n is given by the negative square root ofɛ·μ for the frequencies where both the permittivity and the permeability are negative.