Hyperbolic Metamaterials

Smolyaninov, Igor I.

doi:10.1088/978-1-6817-4565-7

Cited by 106 publications

(17 citation statements)

References 62 publications

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“…The EM responses of materials depend on their permittivities and permeabilities. Thus far, most of the hyperbolic dispersions in artificial and natural optical media originate solely from the electric response, [ 1–6 ] which restricts material functionality to one polarization of light. [ 43 ] Using the TL system, we design magnetic TLCMMs (

ε, \overset{falseˆ}{μ}

) and uncover their associated unique properties.…”

Section: Simulation and Discussionmentioning

confidence: 99%

“…For example, a hyperbolic metamaterial (HMM) exhibits an isofrequency contour (IFC) that is an open hyperboloid and in which the principal components of its electric or magnetic tensor have opposite signs. [ 1–6 ] The topological transition of dispersion from a closed sphere in isotropic media to an open hyperboloid in anisotropic media has been achieved by various means, including changing the real [ 7–9 ] and imaginary parts [ 10,11 ] of electromagnetic (EM) parameters. Similarly to passive control, active control of the topological transition of dispersion using electrically controllable metamaterials is an important research topic.…”

Section: Introductionmentioning

confidence: 99%

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Abnormal Wave Propagation in Tilted Linear‐Crossing Metamaterials

Guo

Jiang

Chen

2020

Advanced Photonics Research

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The propagation properties of electromagnetic waves depend on media dispersion in momentum space, which can be characterized using isofrequency contours (IFCs). Normal linear‐crossing metamaterials (NLCMMs), which undergo a new type of topological transition between two kinds of hyperbolic media, are attracting attention because of their potential as a new avenue for controlling light propagation and verifying unusual phenomena involving zero‐index and hyperbolic media. Herein, the rotation of the optical axis is treated as a new degree of freedom and a tilted linear‐crossing metamaterial (TLCMM) is theoretically proposed. Upon rotating the optical axis angle such that it is equal to the cone angle, it is found that this special TLCMM has the shape of a type‐III Dirac cone, in condensed matter physics. Boundary conditions and the causality law are used to reveal that electromagnetic waves in this critical TLCMM can achieve abnormal refraction without reflection and filtering. Moreover, these phenomena are observed experimentally in a planar circuit‐based system. The results regarding the manipulation of electromagnetic waves may enable their use in planar‐integrated photonics, including for directional propagation, cloaking, and switching.

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ε, \overset{falseˆ}{μ}

) and uncover their associated unique properties.…”

Section: Simulation and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Abnormal Wave Propagation in Tilted Linear‐Crossing Metamaterials

Guo

Jiang

Chen

2020

Advanced Photonics Research

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“…Similar to hyperbolic metamaterials 13 , photoinduced ENZ conditions also have spatial dependence due to EMR polarization. In particular, ENZ conditions should require a specific photon momentum k = ω/c.…”

Section: Photoinduced ǫ Near Zero Conditionsmentioning

confidence: 98%

Photoinduced Screening Breakdown Mediated by Plasmon Excitations and Potential Instabilities in the System

Zheleznyak,

Wallace

2018

Preprint

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In this work, we estimate the effect of photoinduced screening breakdown of the Coulomb potential mediated by plasmons. In contrast to previous studies, we consider the contribution from the divergence of renormalized inverse electron permittivity, which enhances Coulomb interaction at longer ranges. Our work reveals that the Coulomb potential acquires oscillating terms, which for the charged plane case could lead to a spatial heterostructure. In the resonant case (ωp = Ω), photoinduced Coulomb interaction becomes attractive for small values of momenta. This Coulomb interaction renormalization could potentially lead to instabilities in the electron system, such as superconductivity and/or charge density waves. We found possible divergence of the electron coupling constant and discuss herein a potential new mechanism of superconductivity based on electronelectron interaction renormalization via the plasmon oscillating electric field. We also briefly discuss possible photoinduced ǫ near zero conditions.

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“…By modifying the shape of the momentum−space IFC in a given medium, one can flexibly control the propagation, coupling, and radiation characteristics of electromagnetic waves. [ 1–6 ] In particular, when the IFC changes from a closed ellipsoid to an open hyperboloid, the interaction between electromagnetic waves and matter is strongly modified by the topological properties of the structure changes. [ 7–10 ] For normal anisotropic materials, the IFC is a closed ellipsoid, and the wavevector magnitude is limited by the boundary of the closed IFC.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide

Guo

Song

Jiang

et al. 2021

Advanced Photonics Research

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Planar waveguides limit the transmission of electromagnetic waves in a specific direction and have a wide range of applications in filters, sensors, and energy‐transfer devices. However, given the increasing demand for planar‐integrated photonics, new waveguides are required with excellent characteristics such as more functionality, greater efficiency, and smaller size. Herein, the experimental results for a planar microwave‐regime waveguide fabricated from circuit‐based magnetic hyperbolic metamaterial (HMM) are reported. HMM is a special type of anisotropic metamaterial, whose isofrequency contour (IFC) takes the form of an open hyperboloid. Because of the open‐dispersion IFCs, HMMs support propagating high‐k modes with large effective refractive indices, which allow planar hyperbolic waveguides to be miniaturized. Especially, as opposed to the traditional dielectric slab waveguide, the group velocity and phase velocity in hyperbolic waveguides are oriented in opposite directions—a characteristic that is exploited to realize the backward propagation of electromagnetic waves. Based on this property, a backward coupler based on the hyperbolic waveguide is designed and experimented with. Herein, the significant potential of circuit‐based platforms for the experimental study of the propagation and coupling of guided modes is not only revealed but also the use of HMMs for numerous integrated functional devices is promoted.

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Hyperbolic Metamaterials

Cited by 106 publications

References 62 publications

Abnormal Wave Propagation in Tilted Linear‐Crossing Metamaterials

Abnormal Wave Propagation in Tilted Linear‐Crossing Metamaterials

Photoinduced Screening Breakdown Mediated by Plasmon Excitations and Potential Instabilities in the System

Miniaturized Backward Coupler Realized by the Circuit‐Based Planar Hyperbolic Waveguide

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