Enhanced Faraday rotation in hybrid magneto-optical metamaterial structure of bismuth-substituted-iron-garnet with embedded-gold-wires

Sadatgol, Mehdi; Rahman, Mahfuzur; Forati, Ebrahim; Levy, M.; Güney, Durdu Ö.

doi:10.1063/1.4943651

Cited by 28 publications

(21 citation statements)

References 60 publications

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“…Artificial magneto‐optical behavior has been recently demonstrated in photonic‐crystal‐inspired structures and in waveguided geometries, configurations known for their sensitivity to long‐range order and, therefore, highly susceptible to fabrication imperfections. Planar multilayered and more complex geometries have been suggested theoretically …”

Section: Introductionmentioning

confidence: 99%

Magneto‐Optical Metamaterials: Nonreciprocal Transmission and Faraday Effect Enhancement

Fan

Nasir

Nicholls

et al. 2019

Advanced Optical Materials

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the effective medium regime, known for its tolerance to small-scale geometry variations. [9][10][11][12][13] We present comprehensive theoretical, experimental, and numerical analysis of the electromagnetic properties of the magneto-optical metamaterial, demonstrating both the rotation of the polarization plane and nonreciprocal transmission, two phenomena that can be controlled by the direction of the external magnetic field. This enhanced response is the result of the combination of the introduced magneto-optical properties and strong anisotropy of the metamaterial. We demonstrate rotation of the polarization plane with the effective Verdet constant equivalent of at least 10 5 rad m −1 T −1 , significant enhancement with respect to bulk ferromagnetic materials, [14] suggesting that nanostructured magnetic materials have much stronger magneto-optical response than their bulk counterparts. Overall, plasmonic magneto-optical nanorods combine the benefits of sub-wavelength light manipulation offered by metamaterials and of strong magneto-optics offered by plasmonic nanocomposites, leading to a promising material platform for integrated nanophotonic applications.The magneto-optical metamaterial geometry and its optical response are illustrated in Figure 1. The composite is formed by an array of aligned plasmonic (gold) nanorods with magnetooptical (nickel) shells inside a dielectric (alumina) matrix (note that in the composites the Ni shells extend only part-way along the rod; see the Experimental Section). As follows from the geometry, in the absence of an external static magnetic field and in the limit when the unit cell is much smaller than the wavelength (a << λ 0 ), the optical response of the composite can be described by a diagonal permittivity tensor with Cartesian components = ⊥ ⊥ zẑ { , , }     . Effective medium theory can be used to relate the components of the effective permittivity  ⊥ and  zz to the permittivity of the constituent materials as well as to the geometrical parameters of a metamaterial, such as a unit cell a, and radii of the rod r 1 and of the shells around the rod r i , with i = 2, …, N. Existing analytical and numerical tools allow calculations of the optical response of metamaterials composed of rods without shells, with plasmonic and magneto-optical material constituents and in the limit r 1 << a, [1,11,13,15] as well as shelled nanorod composites, comprising nonmagneto-optical materials with arbitrary rod concentration. [12,16] Here, we present a formalism that can incorporate magneto-optical response in the effective-medium description of shelled rod metamaterials and even in the limit  r a i 2 . We consider a metamaterial with a = 64 nm, r 1 = 15 nm, and r 2 = 23 nm and assume that the Magneto-optical effects are at the heart of modern technologies providing opportunities for polarization control in laser physics and optical communications, metrology, and in high-density data storage. Here a new type of a hyperbolic magneto-optical metamaterial based on Au-Ni nanorod arrays ...

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Section: Introductionmentioning

confidence: 99%

Magneto‐Optical Metamaterials: Nonreciprocal Transmission and Faraday Effect Enhancement

Fan

Nasir

Nicholls

et al. 2019

Advanced Optical Materials

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“…[2][3][4][5][6] This resolution was extended further by apertureless SNOM systems, which employed a nanoscale scattering probe in the near-field instead of a subwavelength aperture. [7][8][9][10][11][12][13][14] At the turn of the new millennium, imaginative new approaches for controlling electromagnetic waves began to appear for imaging, [15][16][17][18][19][20][21][22][23] photovoltaics, [24][25][26] quantum information processing and simulations, [27][28][29][30][31] wireless communications, 32,33 and novel optical materials, [34][35][36][37][38][39][40] among many others. The advent of metamaterials with simultaneously negative permittivity and permeability 41 brought renewed interest in the properties of left-handed materials first proposed by Veselago,42 which Pendry demonstrated could be applied to sub-diffraction-limited imaging with his "perfect lens."…”

Section: Introductionmentioning

confidence: 99%

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

2016

Self Cite

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Near-field optics and superlenses for imaging beyond Abbe's diffraction limit are reviewed. A comprehensive and contemporary background is given on scanning near-field microscopy and superlensing. Attention is brought to recent research leveraging scanning near-field optical microscopy with superlenses for new nano-imaging capabilities. Future research directions are explored for realizing the goal of low-cost and high-performance sub-diffraction-limited imaging systems. © 2016 Author(s)

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“…We utilized chiral metamaterials to make a direct analogy between circular polarizations (LHCP and RHCP) of microwaves and spins (up and down) of electrons. Additionally, our optical analog of Stern-Gerlach effects by nonuniform metamaterials is applicable to other metamaterials, for example, magnetooptical metamaterials [27]. Last but not least, we notice that an optical SG effect has been reported [28].…”

Section: B Nonuniform Chiral Metamaterialsmentioning

confidence: 53%

Microwave analog of Stern-Gerlach effects using nonuniform chiral metamaterials

et al. 2017

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This study observes microwave beam splitting dependent on circular polarizations through nonuniform chiral metamaterials. Nonuniform chiral metamaterials with a gradation in refractive index are constructed using chiral meta-atoms that exhibit optical activities at microwave frequencies. Microwave scattering far-field patterns by the nonuniform chiral metamaterials demonstrate a deflection of microwaves, which transmit in a direction perpendicular to the refractive index gradient. Furthermore, circularly polarized microwaves with opposite "spins of light" go their separate ways in the nonuniform chiral metamaterials. This phenomenon is an optical analog of the Stern-Gerlach effects for electrons.

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Enhanced Faraday rotation in hybrid magneto-optical metamaterial structure of bismuth-substituted-iron-garnet with embedded-gold-wires

Cited by 28 publications

References 60 publications

Magneto‐Optical Metamaterials: Nonreciprocal Transmission and Faraday Effect Enhancement

Magneto‐Optical Metamaterials: Nonreciprocal Transmission and Faraday Effect Enhancement

Review of near-field optics and superlenses for sub-diffraction-limited nano-imaging

Microwave analog of Stern-Gerlach effects using nonuniform chiral metamaterials

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