Optical properties of fourteen metals in the infrared and far infrared: Al, Co, Cu, Au, Fe, Pb, Mo, Ni, Pd, Pt, Ag, Ti, V, and W

Ordal, Mark A.; Bell, Robert J.; Alexander, Ralph; Long, Larry L.; Querry, Marvin R.

doi:10.1364/ao.24.004493

Cited by 1,207 publications

(662 citation statements)

References 4 publications

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“…For example, following the experimental data tabulated in Ref. 13 at IR frequencies, silver may be well characterized by a Drude model Ag / 0 = ϱ − p 2 / ͑ + i⌫͒ , with ϱ = 5.0, p =2 ϫ 2175͓THz͔, and ⌫ =2 ϫ 4.35͓THz͔. This yields Ag Ϸ 470͑−1 + 0.04i͒ 0 at 100 THz, which is 2 orders of magnitude larger than the typical values required for cloaking applications.…”

Section: Metamaterials Designmentioning

confidence: 87%

“…These values were chosen to obtain Re͕ eff ͖ = −3.0 0 at 100 THz, and they will be used in the following to design a plasmonic metamaterial cloak. In the same graphic we have also plotted ͑using a different scale͒ the permittivity of silver 13 to show how dramatically different the two dispersions are. Indeed, the permittivity of silver is 2 orders of magnitude larger than the one of the composite medium.…”

Section: Metamaterials Designmentioning

confidence: 99%

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Infrared and optical invisibility cloak with plasmonic implants based on scattering cancellation

2008

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Engheta, "Infrared and optical invisibility cloak with plasmonic implants based on scattering cancellation", . August 2008. Infrared and optical invisibility cloak with plasmonic implants based on scattering cancellation AbstractIn recent works, we have suggested that plasmonic covers may provide an interesting cloaking effect, dramatically reducing the overall visibility and scattering of a given object. While materials with the required properties may be directly available in nature at some specific infrared or optical frequencies, this is not necessarily the case for any given design frequency of interest. Here we discuss how such plasmonic covers may be specifically designed as metamaterials at terahertz, infrared, and optical frequencies using naturally available metals. Using full-wave simulations, we demonstrate that the response of a cover formed by metallic plasmonic implants may be tailored at will so that at a given frequency, it possesses the plasmonic-type properties required for cloaking applications. In recent works, we have suggested that plasmonic covers may provide an interesting cloaking effect, dramatically reducing the overall visibility and scattering of a given object. While materials with the required properties may be directly available in nature at some specific infrared or optical frequencies, this is not necessarily the case for any given design frequency of interest. Here we discuss how such plasmonic covers may be specifically designed as metamaterials at terahertz, infrared, and optical frequencies using naturally available metals. Using full-wave simulations, we demonstrate that the response of a cover formed by metallic plasmonic implants may be tailored at will so that at a given frequency, it possesses the plasmonic-type properties required for cloaking applications.

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Section: Metamaterials Designmentioning

confidence: 87%

Section: Metamaterials Designmentioning

confidence: 99%

Infrared and optical invisibility cloak with plasmonic implants based on scattering cancellation

2008

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“…We assume that the nanowires are made of silver, with plasmon and damping frequencies ω p = 13.7 × 10 15 rad s −1 and ν = 2.7 × 10 14 rad s −1 [26].…”

Section: Physical System and Theoretical Modelmentioning

confidence: 99%

Anderson localization at the subwavelength scale for surface plasmon polaritons in disordered arrays of metallic nanowires

et al. 2014

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Using one-and two-dimensional random arrays of coupled metallic nanowires as a generic example of disordered plasmonic systems, we demonstrate that the structural disorder induces localization of light in these nanostructures at a deep-subwavelength scale. The ab initio analysis is based on solving the complete set of three-dimensional Maxwell equations. We find that random variations of the radius of coupled plasmonic nanowires are sufficient to induce the Anderson localization (AL) of surface plasmon polaritons (SPPs), the size of these trapped modes being significantly smaller than the optical wavelength. Remarkably, the optical-gain coefficient, needed to compensate for losses in the plasmonic components of the system, is much smaller than the loss coefficient of the metal, which is obviously beneficial for the realization of the AL in plasmonic nanostructures. The dynamics of excitation and propagation of the Anderson-localized SPPs are addressed too.

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“…The parameters to calculate the specific intensity for the two samples are the sphere size with radius a = 500 µm, the permittivities of the surrounding media 0 = 1 and 2 = 1, and the background medium (PE) 1 = 2.1316. The permittivity of scatterers was assumed to be p = −5 × 10 4 + i4 × 10 5 which is an approximate value for Iron in THz frequency region from [33]. The sample thickness and fractional volume of the metal spheres are given in Table 1.…”

Section: Simulation Process Using Rt Theorymentioning

confidence: 99%

Modeling Terahertz Diffuse Scattering From Granular Media Using Radiative Transfer Theory

Nam¹,

Zurk²,

Schecklman³

2012

PIER B

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Abstract-Terahertz (THz) spectroscopy can potentially be used to probe and characterize inhomogeneous materials. However, identification of spectral features from diffuse scattering by inhomogeneous materials has not received much attention until now. In this paper, THz diffuse scattering from granular media is modeled by applying radiative transfer (RT) theory for the first time in THz sensing. The diffuse scattered field from compressed polyethylene (PE) pellets containing steel spheres was measured in both transmission and reflection modes using a THz time domain spectroscopy (THz-TDS) system. The RT model was validated by successfully reproducing qualitative features observed in experimental results. Diffuse intensity from granular media containing lactose was then simulated using RT theory. In the results, spectral features of lactose were observed in the diffuse intensity spectra from the granular media.

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Optical properties of fourteen metals in the infrared and far infrared: Al, Co, Cu, Au, Fe, Pb, Mo, Ni, Pd, Pt, Ag, Ti, V, and W

Cited by 1,207 publications

References 4 publications

Infrared and optical invisibility cloak with plasmonic implants based on scattering cancellation

Infrared and optical invisibility cloak with plasmonic implants based on scattering cancellation

Anderson localization at the subwavelength scale for surface plasmon polaritons in disordered arrays of metallic nanowires

Modeling Terahertz Diffuse Scattering From Granular Media Using Radiative Transfer Theory

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