Journal ArticleDOI
Total external reflection from metamaterials with ultralow refractive index
Brian T. Schwartz,Rafael Piestun +1 more
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In this article, the effect of total external reflection on metal-dielectric nanostructures is investigated when light from vacuum is incident onto these materials at an angle exceeding the critical angle defined by Snell's law.Abstract:
Metamaterials composed of metal-dielectric nanostructures are engineered to have an effective refractive index less than unity at optical wavelengths. The effect of total external reflection is demonstrated when light from vacuum is incident onto these materials at an angle exceeding the critical angle defined by Snell’s law. Novel approaches are discussed to derive the effective index of refraction from the reflection and refraction properties of finite slabs. The effect of losses and dispersion are analyzed in the visible range of frequencies by consideration of the measured properties of silver. The differences among ultralow refractive-index metamaterials, photonic bandgap materials, and metals are discussed. Remarkably, a bandgap is not required to obtain total external reflection.read more
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Proceedings Article
Photonic crystals
Igor S. Nefedov,M. Marciniak +1 more
TL;DR: In this paper, the authors describe photonic crystals as the analogy between electron waves in crystals and the light waves in artificial periodic dielectric structures, and the interest in periodic structures has been stimulated by the fast development of semiconductor technology that now allows the fabrication of artificial structures, whose period is comparable with the wavelength of light in the visible and infrared ranges.
Journal ArticleDOI
Optical cloaking with metamaterials
TL;DR: This work presents the design of a non-magnetic cloak operating at optical frequencies, and the principle and structure of the proposed cylindrical cloak are analysed and the general recipe for the implementation of such a device is provided.
Journal ArticleDOI
Mechanism for designing metallic metamaterials with a high index of refraction.
TL;DR: In this article, the authors introduce a mechanism for creating artificial high refractive index metamaterials by exploiting the existence of subwavelength propagating modes in metallic systems, which can be made arbitrarily large.
Journal ArticleDOI
Metamagnetics with rainbow colors.
Wenshan Cai,Uday K. Chettiar,Hsiao-Kuan Yuan,Vashista C. de Silva,Alexander V. Kildishev,Vladimir P. Drachev,Vladimir M. Shalaev +6 more
TL;DR: A family of coupled nanostrips with varying dimensions is demonstrated exhibiting optical magnetic responses across the whole visible spectrum, from red to blue, which is referred to as rainbow magnetism.
Journal ArticleDOI
Experimental Verification of n = 0 Structures for Visible Light
TL;DR: In this article, a metal-dielectric nanostructure with an effective refractive index $n=0$ in the visible spectral range was constructed and a vanishing phase advance was observed at the cutoff frequency.
References
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Book
Handbook of Optical Constants of Solids
TL;DR: In this paper, E.D. Palik and R.R. Potter, Basic Parameters for Measuring Optical Properties, and W.W.Hunter, Measurement of Optical Constants in the Vacuum Ultraviolet Spectral Region.
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.
Journal ArticleDOI
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.
Proceedings Article
Photonic crystals
Igor S. Nefedov,M. Marciniak +1 more
TL;DR: In this paper, the authors describe photonic crystals as the analogy between electron waves in crystals and the light waves in artificial periodic dielectric structures, and the interest in periodic structures has been stimulated by the fast development of semiconductor technology that now allows the fabrication of artificial structures, whose period is comparable with the wavelength of light in the visible and infrared ranges.
Journal ArticleDOI
Determination of effective permittivity and permeability of metamaterials from reflection and transmission coefficients
TL;DR: In this article, the authors analyzed the reflection and transmission coefficients calculated from transfer matrix simulations on finite lengths of electromagnetic metamaterials, to determine the effective permittivity and permeability.