Uniaxial epsilon-near-zero metamaterial for angular filtering and polarization control

Alekseyev, Leonid; Narimanov, Evgenii E.; Tumkur, T. U.; Li, H.; Barnakov, Yu. A.; Noginov, M. A.

doi:10.1063/1.3469925

Cited by 125 publications

(80 citation statements)

References 24 publications

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“…Usually, large gain is expected for strong amplification, but the gain cannot be very large in practice. A special material of zero permittivity ε or permeability μ provides us some special properties [6][7][8][9][10]. Several interesting applications have been reported, such as directive radiation and spatial filtering [6][7][8], squeezing electromagnetic energy [9] and nonlinear optics [10].…”

Section: Introductionmentioning

confidence: 99%

Arbitrarily thin metamaterial structure for perfect absorption and giant magnification

Jin¹,

Xiao²,

Mortensen³

et al. 2011

Opt. Express

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Section: Introductionmentioning

confidence: 99%

Arbitrarily thin metamaterial structure for perfect absorption and giant magnification

Jin¹,

Xiao²,

Mortensen³

et al. 2011

Opt. Express

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“…3 Metamaterial development relies on nanofabrication of features much smaller than the wavelength, traditionally requiring expensive techniques, such as electron beam lithography, with difficulty in scaling up samples to practical sizes. Notably, there have been recent demonstrations of large-area fabrication of two types of hyperbolic metamaterials: anodized alumina membranes, filled with metal nanocolumns 4,5 and metallo-dielectric laminates. 6 The uniaxial permittivity and hyperbolicity in both these types of materials arises from the effective-medium homogenization of their dielectric properties.…”

Section: Introductionmentioning

confidence: 99%

Permittivity evaluation of multilayered hyperbolic metamaterials: Ellipsometry vs. reflectometry

Tumkur

Barnakov

Kee

et al. 2015

Journal of Applied Physics

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Metal-dielectric nanolaminates represent a class of hyperbolic metamaterials with uniaxial permittivity tensor. In this study, we critically compare permittivity extraction of nanolaminate samples using two techniques: polarized reflectometry vs. spectroscopic anisotropic ellipsometry. Both Au/MgF2 and Ag/MgF2 metal-dielectric stacks are examined. We demonstrate the applicability of the treatment of the multilayered material as a uniaxial medium and compare the derived optical parameters to those expected from the effective medium approximation. We also experimentally compare the effect of varying the material outer layer on the homogenization of the composite. Additionally, we introduce a simple empirical method of extracting the epsilon-near-zero point of the nanolaminates from normal incidence reflectance. The results of this study are useful in accurate determination of the hyperbolic material permittivity and in the ability to tune its optical properties.

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“…The electric field intensity within an ENZ medium can be enhanced relative to that in free space leading to strong light absorption [5]. This enhanced absorption in ENZ media has been exploited for novel polarization control and filtering in thin films [6], as well the proposal to use ENZ absorption resonances to tune thermal blackbody radiation of a heated object to the band-gap of a photovoltaic cell [7]. An enhanced non-linear response based upon strong spatial dispersion of waves in ENZ media has been demonstrated, and proposed for all-optical switching [8,9].…”

mentioning

confidence: 99%

Ferrell–Berreman Modes in Plasmonic Epsilon-near-Zero Media

et al. 2014

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We observe unique absorption resonances in silver/silica multilayer-based epsilon-near-zero (ENZ) metamaterials that are related to radiative bulk plasmon-polariton states of thin-films originally studied by Ferrell (1958) and Berreman (1963). In the local effective medium, metamaterial description, the unique effect of the excitation of these microscopic modes is counterintuitive and captured within the complex propagation constant, not the effective dielectric permittivities. Theoretical analysis of the band structure for our metamaterials shows the existence of multiple Ferrel-Berreman branches with slow light characteristics. The demonstration that the propagation constant reveals subtle microscopic resonances can lead to the design of devices where Ferrell-Berreman modes can be exploited for practical applications ranging from plasmonic sensing to imaging and absorption enhancement. Keywords: plasmon resonance, epsilon-near-zero, metamaterials, plasmonics An important class of artificial media are the epsilon-near-zero (ENZ) metamaterials that are designed to have a vanishing dielectric permittivity | | → 0. Waves propagating within ENZ media have a divergent phase velocity that can be used to guide light with zero phase advancement through sharp bends within sub-wavelength size channels [1, 2], or to tailor the phase of radiation/luminescence within a prescribed ENZ structure [3,4]. The electric field intensity within an ENZ medium can be enhanced relative to that in free space leading to strong light absorption [5]. This enhanced absorption in ENZ media has been exploited for novel polarization control and filtering in thin films [6], as well the proposal to use ENZ absorption resonances to tune thermal blackbody radiation of a heated object to the band-gap of a photovoltaic cell [7]. An enhanced non-linear response based upon strong spatial dispersion of waves in ENZ media has been demonstrated, and proposed for all-optical switching [8,9].Here we show theoretically and experimentally that ENZ metamaterials support unique absorption resonances related to radiative bulk plasmon-polaritons of thin metal films. These radiative bright modes exhibit properties in stark contrast to conventional dark modes of thin-film media (surface plasmon polaritons). The unique absorption resonances manifested in our metamaterials were originally studied by Ferrell in 1958 for plasmon-polaritonic thinfilms in the ultraviolet [10], and by Berreman in 1963 for phonon-polaritonic thin-films in the mid-infrared spectral region [11]. Surprisingly, two research communities have developed this independently with little communication or overlap until now: we therefore address these resonances as Ferrell-Berreman (FB) modes of our metamaterials. Counterintiutively, in the metamaterial effective medium picture, these resonances are not captured in the metamaterial dielectric permittivity constants but rather in the effective propagation constant. Furthermore, we show the existence of multiple branches of such FB modes that have slow ...

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Uniaxial epsilon-near-zero metamaterial for angular filtering and polarization control

Cited by 125 publications

References 24 publications

Arbitrarily thin metamaterial structure for perfect absorption and giant magnification

Arbitrarily thin metamaterial structure for perfect absorption and giant magnification

Permittivity evaluation of multilayered hyperbolic metamaterials: Ellipsometry vs. reflectometry

Ferrell–Berreman Modes in Plasmonic Epsilon-near-Zero Media

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