Anomalous birefringence and enhanced magneto-optical effects in epsilon-near-zero metamaterials based on nanorods’ arrays

Kolmychek, I. A.; Pomozov, A. R.; Novikov, V. B.; Leontiev, A. P.; Napolskii, K. S.; Murzina, T. V.

doi:10.1364/oe.27.032069

Cited by 15 publications

(18 citation statements)

References 16 publications

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“…The Faraday effect can be used to design active optical materials as the optical properties of the system (light polarization) can be finely adjusted only by applying an external magnetic field. Au NRs have been demonstrated to be able to significantly enhance the Faraday effect of nickel films . The magneto–optical Kerr effect is another magneto–optical effect that is analogous to the Faraday effect.…”

Section: Plasmonic Properties Based On Classical Electromagnetismmentioning

confidence: 99%

“…Au NRs have been demonstrated to be able to significantly enhance the Faraday effect of nickel films. 979 The magneto−optical Kerr effect is another magneto−optical effect that is analogous to the Faraday effect. In the case of the magneto−optical Kerr effect, once light is incident upon the surface of a magneto−optical system, the polarization state of the reflected light can be altered provided that a certain magnetic field exists.…”

Section: Multifield Coupling Effectmentioning

confidence: 99%

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Gold Nanorods: The Most Versatile Plasmonic Nanoparticles

et al. 2021

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Gold nanorods (NRs), pseudo-one-dimensional rod-shaped nanoparticles (NPs), have become one of the burgeoning materials in the recent years due to their anisotropic shape and adjustable plasmonic properties. With the continuous improvement in synthetic methods, a variety of materials have been attached around Au NRs to achieve unexpected or improved plasmonic properties and explore state-of-the-art technologies. In this review, we comprehensively summarize the latest progress on Au NRs, the most versatile anisotropic plasmonic NPs. We present a representative overview of the advances in the synthetic strategies and outline an extensive catalogue of Au-NR-based heterostructures with tailored architectures and special functionalities. The bottom-up assembly of Au NRs into preprogrammed metastructures is then discussed, as well as the design principles. We also provide a systematic elucidation of the different plasmonic properties associated with the Au-NR-based structures, followed by a discussion of the promising applications of Au NRs in various fields. We finally discuss the future research directions and challenges of Au NRs.

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Section: Plasmonic Properties Based On Classical Electromagnetismmentioning

confidence: 99%

Section: Multifield Coupling Effectmentioning

confidence: 99%

Gold Nanorods: The Most Versatile Plasmonic Nanoparticles

et al. 2021

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“…We fixed Λ = ±0.1 and f = 0.81 (i.e., L / a = 0.9) for all magnetized PhCs, all calculations are performed using the finite-element method-based software package COMSOL Multiphysics. In the experiment, hyperbolic metamaterials and the low-loss indium tin oxide are possible candidates for ENZ-MO materials; ,, furthermore, using ferromagnetic nanogranular materials may obtain a large Λ. − Figure b,c shows schematic band structures of MO-based 2D honeycomb PhCs near Brillouin zone corners without and with magnetization, respectively. Without magnetization (Λ = 0), ε̂ MO is reduced to a scalar relative permittivity and the PhC preserves SIS and TRS.…”

Section: Resultsmentioning

confidence: 99%

“…ENZ slabs or metamaterials are also well-known for manipulating the flow of light, such as electromagnetic wave tunneling through distorted channels, tailoring the radiation phase pattern, efficient vortex generation, and enhancing asymmetric transmission . Recently, enhanced MO effects were observed in hyperbolic metamaterials at ENZ wavelengths. , Materials with both ENZ property and MO responses, i.e., ENZ-MO materials, play an important role in various applications, such as nonreciprocal transmission, optical isolation, unidirectional mode propagation, , and circulation-dependent sources . However, the application of ENZ-MO materials for enlarging the sizes of topological photonic band gaps has not yet been investigated so far.…”

Section: Introductionmentioning

confidence: 99%

Topological Band Gaps Enlarged in Epsilon-Near-Zero Magneto-Optical Photonic Crystals

et al. 2022

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Topological photonics provides exciting and emerging opportunities for the manipulation of light. As the photonic analogue of quantum Hall edge states, chiral edge modes, arising at the interface between two photonic topological structures with different Chern numbers, hold great promise for robust transport of light against disorders and defects. However, for magneto-optical material-based topological photonic crystals, the transport performance of chiral edge modes is strongly dependent on the topological gap sizes, which are usually very narrow at optical frequencies due to the lack of magneto-optical materials with strong nonreciprocal responses. Here, we numerically demonstrated that the introduction of an epsilon-near-zero effect to magneto-optical photonic crystals could remarkably enlarge topological gap sizes due to the boosted magneto-optical response. Eigenmode calculation results show that the boosted magneto-optical response correlates to the enhanced nonreciprocal power flows in magnetized photonic crystals with an epsilon-near-zero diagonal permittivity. The enlarged topological band gap leads to the broadband and well-confined chiral edge modes propagating along the magnetized boundary between two oppositely magnetized photonic crystals. More importantly, such mode propagation shows strong robustness against sharp bends and large defects. In principle, our proposal for the enlargement of topological photonic band gaps could also be valid in photonic crystal slabs or even three-dimensional photonic crystals. Our results not only suggest the possibility to improve the transport performance of one-way modes in magneto-optical photonic crystals but also enrich the physical understanding of the epsilon-near-zero effect-based topological photonics.

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“…The use of bare magneto-optical materials to observe free-space radiation from coupled plasmon-phonon modes has been demonstrated; however the wavelength regimes are limited to the far IR, and the dependence on magnetic field was not measured ( 22 ). Prior experimental work on free-space magneto-optical elements has investigated coupling to surface plasmon resonances at a fixed incidence angle in the Otto configuration in the far-IR regime ( 23 ) and polarization rotation in the Faraday geometry ( 24 , 25 ). Pairing magneto-optical semiconductors with photonic crystals and examining the magnetic field and angular dependence in the IR have not yet been experimentally explored.…”

Section: Introductionmentioning

confidence: 99%

Nonreciprocal infrared absorption via resonant magneto-optical coupling to InAs

et al. 2022

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Nonreciprocal elements are a vital building block of electrical and optical systems. In the infrared regime, there is a particular interest in structures that break reciprocity because their thermal absorptive (and emissive) properties should not obey the Kirchhoff thermal radiation law. In this work, we break time-reversal symmetry and reciprocity in n-type–doped magneto-optic InAs with a static magnetic field where light coupling is mediated by a guided-mode resonator structure, whose resonant frequency coincides with the epsilon-near-zero resonance of the doped indium arsenide. Using this structure, we observe the nonreciprocal absorptive behavior as a function of magnetic field and scattering angle in the infrared. Accounting for resonant and nonresonant optical scattering, we reliably model experimental results that break reciprocal absorption relations in the infrared. The ability to design these nonreciprocal absorbers opens an avenue to explore devices with unequal absorptivity and emissivity in specific channels.

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Anomalous birefringence and enhanced magneto-optical effects in epsilon-near-zero metamaterials based on nanorods’ arrays

Cited by 15 publications

References 16 publications

Gold Nanorods: The Most Versatile Plasmonic Nanoparticles

Gold Nanorods: The Most Versatile Plasmonic Nanoparticles

Topological Band Gaps Enlarged in Epsilon-Near-Zero Magneto-Optical Photonic Crystals

Nonreciprocal infrared absorption via resonant magneto-optical coupling to InAs

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