Optical refraction in silver: counterposition, negative phase velocity and orthogonal phase velocity

Naqvi, Qaisar Abbas; Mackay, Tom G.; Lakhtakia, Akhlesh

doi:10.1088/0143-0807/32/4/004

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…It was also predicted for bulk metals in case of specially polarized incident light [26,28]. However, as far as we know, negative refraction of phase velocity in conventional media has never been reported before.…”

Section: Metallic Prismmentioning

confidence: 61%

Negative refraction of inhomogeneous waves in lossy isotropic media

Fedorov

Nakajima

2014

J. Opt.

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Abstract. We theoretically study negative refraction of inhomogeneous waves at the interface of lossy isotropic media. We obtain explicit (up to the sign) expressions for the parameters of a wave transmitted through the interface between two lossy media characterized by complex permittivity and permeability. We show that the criterion of negative refraction that requires negative permittivity and permeability can be used only in the case of a homogeneous incident wave at the interface between a lossless and lossy media. In a more general situation, when the incident wave is inhomogeneous, or both media are lossy, the criterion of negative refraction becomes dependent on an incident angle. Most interestingly, we show that negative refraction can be realized in conventional lossy materials (such as metals) if their interfaces are properly oriented.

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Section: Metallic Prismmentioning

confidence: 61%

Negative refraction of inhomogeneous waves in lossy isotropic media

Fedorov

Nakajima

2014

J. Opt.

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“…To be more specific, we consider a circular cylinder of silver metal with the relative permittivity written as [14] …”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…For example, it gives low power dissipation at optical frequency range, and hence, the apple of eyes of metamaterial designers. It can be used as special filter [10], and also, many innovative concepts like counterposition [11], transition from positive to negative phase velocity [12], orthogonal phase velocity [13], etc., are observed in the case of silver metal at optical frequencies [14].…”

Section: Introductionmentioning

confidence: 85%

On the frequency response of silver metal with cylindrical geometry

Mahmood

Illahi

Syed

et al. 2015

Optik

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“…[9] In the case of L-nihility medium engineered from silver metal, it is observed that the real part of permittivity of silver metal becomes zero at certain frequency. [10] Strip periodic surfaces possess fascinating and novel characteristics that can be employed in antenna-related applications.…”

Section: Introductionmentioning

confidence: 99%

Scattering from silver metal cylinder due to L-nihility coated with conducting sheath helix embedded dielectric medium

Iqbal

Choudhury

Menon

2015

Journal of Electromagnetic Waves and Applications

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In this article, scattering from silver metal cylinder due to L-nihility, coated with dielectric material that encapsulates perfectly electric conducting sheath helix structure, is presented. The orientation of helix can be altered, and the cases of both the parallel (TM) and the perpendicular (TE) polarizations of electromagnetic (EM) waves are analyzed. Co-and cross-polarized fields for different values of pitch angle are formulated under oblique angle of incidence. The bi-static echo width of the scatterer is investigated as a function of / at the L-nihility frequency which lies within the optical frequency range. The results are compared with those obtained for perfect electric conductor (PEC) at different values of the angle of incidence. It is observed that the considered guiding structure behaves identically with the simple PEC cylinder under the situation when the helix structure is oriented parallel to the axial direction of the guide. However, for the other forms of the helix orientation, the structure behaves differently -thereby confirming the validity of the analytical approach for the aforementioned complex structured guide presented in the article.

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Optical refraction in silver: counterposition, negative phase velocity and orthogonal phase velocity

Cited by 10 publications

References 24 publications

Negative refraction of inhomogeneous waves in lossy isotropic media

Negative refraction of inhomogeneous waves in lossy isotropic media

On the frequency response of silver metal with cylindrical geometry

Scattering from silver metal cylinder due to L-nihility coated with conducting sheath helix embedded dielectric medium

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