Chiral Metamaterials With Negative Refractive Index Composed by an Eight-Cranks Molecule

Molina‐Cuberos, G. J.; Garcia-Collado, A.J.; Barba, I.; Margineda, J.

doi:10.1109/lawp.2011.2181306

Cited by 10 publications

(15 citation statements)

References 9 publications

(12 reference statements)

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“…Broadband Simulation. In order to compare results, a first simulation was performed using a single honeycomb layer (that is, a structure similar to the ones studied in [1,9]) with h = 15 mm. Periodical (unit cell) boundary conditions were used in the lateral walls.…”

Section: Resultsmentioning

confidence: 99%

“…If we define the ellipticity as the angle 2η whose tangent is the minor to major amplitude ratio of the polarization ellipse, then a plane wave, linearly Figure 1: Geometry of the bilayered chiral structure under study. It is composed of two layers: the top layer is similar to the ones studied in [1,9] and the second layer is the specular image of the first one. 3D view (a) and front view (b) of the structure.…”

Section: Chiral Bi-isotropic Mediamentioning

confidence: 99%

“…Consequences of this effect are a rotation of the polarization angle when the travelling wave is linearly polarized (optical/electromagnetic activity), as well as a polarization change from lineal to elliptical and, eventually, circular [5]. Furthermore, in 2004, it was predicted that materials with strong electromagnetic activity can also possess a negative refractive index [7], and since then, several chiral metamaterial (CM) designs have been proposed and probed to produce such a negative refractive index [8,9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Full-Dielectric Chiral Material Based on a Honeycomb Structure

Barba

Grande

Molina‐Cuberos

et al. 2018

International Journal of Antennas and Propagation

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Section: Resultsmentioning

confidence: 99%

Section: Chiral Bi-isotropic Mediamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Full-Dielectric Chiral Material Based on a Honeycomb Structure

Barba

Grande

Molina‐Cuberos

et al. 2018

International Journal of Antennas and Propagation

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“…The characterization method assumes linearly polarized incident waves, normal incidence and requires the determination of the co-polar and cross-polar transmission coefficients, tCo and tCross and co-polar reflection coefficients, rCo. The transmission ( ±± = ∓ · ) and reflection (r=rCo) coefficients for RHCP and LHCP are obtained by making use of the Jones Matrix notation [19]. The first subindex in t++ represents the handedness of the transmitted wave, while the second one represents the handedness of the incident wave.…”

Section: B Numerical and Experimental Characterizationmentioning

confidence: 99%

Low-Loss Left-Handed Gammadion-Fishnet Chiral Metamaterials

Fernández

Gómez

Vegas

et al. 2019

Antennas Wirel. Propag. Lett.

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Negative refraction has many potential applications in the Information and Communications Technology field. However, the high losses of most negative refraction materials prevents the use of this novel property in the implementation of practical devices in the HF range. In attempt to overcome this inconvenience, we present two Gammadion-Fishnet chiral metamaterial structures, constituted by the combination of a lossy chiral metamaterial and different fishnet structures. The electromagnetic characterization of the proposed metamaterials provides a larger bandwidth with negative refraction as well as lower losses when is compared with the initial structures. The results were obtained by using both numerical and experimental data which supports our designs.

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“…Metamaterials, i.e., artificial effective media with supernatural properties, provide diverse unique optical properties such as negative permeability, or permittivity, negative refractive index, optical chirality, or unusual high‐index . Those unique optical properties facilitate new optical systems such as multifunctional optical filter, phase modulator, gradient index lens, perfect/super lens, and optical clocking supported by transformation optics or even active optical devices so called “meta‐devices”.…”

Section: Introductionmentioning

confidence: 99%

Extraordinary Figure‐of‐Merit of Magnetic Resonance from Ultrathin Silicon Nanohole Membrane as All‐Dielectric Metamaterial

Park

Lee

Kwon

et al. 2016

Advanced Optical Materials

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index, [4][5][6][7][8] optical chirality, [9][10][11][12][13] or unusual high-index. [14] Those unique optical properties facilitate new optical systems such as multifunctional optical filter, phase modulator, gradient index lens, perfect/ super lens, and optical clocking supported by transformation optics or even active optical devices so called "meta-devices". Those metamaterial has been successfully demonstrated by using various metallic subwavelength structures based on a split ring resonator, metallic cut-wire arrays, and double fishnet structures. [1,8,15,16] However, passive metallic metamaterials at optical frequencies typically exhibit considerable conduction loss due to their metallic nature, which impedes practical device applications. Furthermore, their intrinsic geometrical asymmetry causes high angular dependency, which restricts wide-angle operation and 3D assembly as well. Recently, all-dielectric metamaterials actively move onto an emerging and attractive approach for controlling electromagnetic (EM) fields to take full benefits of low-loss, bandwidth enhancement, and isotropic responses. [17][18][19] Theoretical concept was first proposed by Lewin [20] and the dielectric metamaterials have experimentally demonstrated at microwave and infrared region by using high-index subwavelength structures such as silicon, [21][22][23][24][25] dielectric composite, [26] TiO 2 , [27] and tellurium cubic arrays. [28] Moreover, all-dielectric metamaterials have been employed for zero-index metamaterial, [29] gradient optical elements, [30,31] or optomechanical metamaterial with free-standing silicon membrane, [25] but still not for biosensor. All-dielectric metamaterial based on silicon realized the high figure-of-merit (FOM) of 103 by using electromagnetically induced transparency at the working wavelengths over 1.3 µm. [23] However, the previous work has limitations in practical use such as biosensing, because the conventional siliconbased spectrum systems cannot be applied at the wavelength larger than 1.3 µm.Here we report a silicon dielectric metamaterial providing a magnetic resonance at near-infrared frequencies and label-free sensing with an extraordinarily resolvable shift of magnetic resonance. This all-dielectric metamaterial consists of subwavelength nanohole arrays in a square lattice on an ultrathin Metamaterial allows novel nanophotonic applications such as negative permeability, negative refractive index, and near-zero index. In particular, all-dielectric metamaterials recently create new opportunities for manipulating electromagnetic fields, taking full advantage of low-loss, bandwidth enhancement, and isotropic responses. Here a silicon dielectric metamaterial is reported in near-infrared region, exhibiting extraordinarily figure-ofmerit, defined by sensitivity (resonance shift/refractive index change) over full width at half maximum, from magnetic resonance shift depending on index changes of surrounding medium. This silicon dielectric metamaterial comprises subwavelength nanohole arrays in a...

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Chiral Metamaterials With Negative Refractive Index Composed by an Eight-Cranks Molecule

Cited by 10 publications

References 9 publications

A Full-Dielectric Chiral Material Based on a Honeycomb Structure

A Full-Dielectric Chiral Material Based on a Honeycomb Structure

Low-Loss Left-Handed Gammadion-Fishnet Chiral Metamaterials

Extraordinary Figure‐of‐Merit of Magnetic Resonance from Ultrathin Silicon Nanohole Membrane as All‐Dielectric Metamaterial

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