Tailoring the near-field guiding properties of magnetic metamaterials with two resonant elements per unit cell

Sydoruk, O.; Radkovskaya, A.; Zhuromskyy, O.; Shamonina, E.; Shamonin, Mikhail; Stevens, C.J.; Faulkner, Grahame; Edwards, D.J.; Solymár, L.

doi:10.1103/physrevb.73.224406

Cited by 66 publications

(55 citation statements)

References 46 publications

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“…1). The SRRs are coupled magnetically and/or electrically through dipole-dipole forces [13][14][15][16] and are regarded as RLC circuits, featuring a resistance R, an inductance L, and a capacitance C. In the equivalent circuit model picture [16,[26][27][28], ex- …”

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confidence: 99%

Gain-Driven Discrete Breathers inPT-Symmetric Nonlinear Metamaterials

2013

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We introduce a one dimensional parity-time (PT )-symmetric nonlinear magnetic metamaterial consisting of split-ring dimers having both gain and loss. When nonlinearity is absent we find a transition between an exact to a broken PT -phase; in the former the system features a two band gapped spectrum with shape determined by the gain and loss coefficients as well as the inter-unit coupling. In the presence of nonlinearity we show numerically that as a result of the gain/dissipation matching a novel type of long-lived stable discrete breathers can form below the lower branch of the band with no attenuation. In these localized modes the energy is almost equally partitioned between two adjacent split rings on the one with gain and the other one with loss.PACS numbers: 63.20. Pw, 11.30.Er, 78.67.Pt Considerable research effort has recently focused in the investigation and developement of artificial materials that exhibit properties not found in nature. In the electromagnetic domain, these advances resulted in the construction of metamaterials, novel artificial structures that provide full access to all four quadrants of the real permittivity -permeability plane [1]. Recently, there has been increasing interest in synthetic materials with a combined parity -time (PT ) symmetry. Although quantum systems described by PT −symmetric Hamiltonians have been studied for many years ([2] and refs. therein), it was only recently realized that many classical systems are PT −symmetric [3]. Subsequently, the notion of PT symmetry has been extended to dynamical lattices, particularly in optics [4,5]. Soon after that, PT −symmetry breaking was experimentally observed [6][7][8]. Such considerations have been also extended in nonlinear lattices, where the existence of stable discrete solitons [9] and Talbot effects [10] was theoretically demonstrated.Among recent developements in PT −symmetric materials, the application of these ideas in electronic circuits [11] not only provides a platform for testing the new ideas within the framework of easily accessible experimental configurations, but also provides a link to metamaterials. Conventional, metallic metamaterials suffer from high losses that hamper their use in practical applications. However, building metamaterials with PT symmetry, relying on gain and loss, may provide a way out and moreover lead to new extraordinary properties. It is shown that PT −symmetric metamaterials undergo spontaneous symmetry breaking from the exact PT phase (real eigenfrequencies) to the broken PT phase (at least a pair of complex eigenfrequencies), with variation of the gain/loss coefficient. In the presence of nonlinearity, the generation of long-lived excitations in the form of discrete breathers (DBs) [12] is demonstrated numerically in metamaterial models. These novel gain-driven DBs, generated either by proper intialization of the PT metamaterial or purely dynamically through external driving, result from power matching of the input power through the gain mechanism and internal loss.SRR with Loss ...

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confidence: 99%

Gain-Driven Discrete Breathers inPT-Symmetric Nonlinear Metamaterials

2013

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“…A kind of polariton mode could be formed by the interaction between the electromagnetic and MI waves, resulting in a tenability of the range where μ becomes negative [57]. In a biperiodic chain of magnetic resonators, the dispersion of the MI wave will be split into two branches analogous to acoustic waves in solids, and this can be used to obtain specified dispersion properties [59,60]. In addition to this kind of MI wave, electro-inductive (EI) waves were also reported in the microwave range [61].…”

Section: Coherent Collective Waves In One-dimensional Meta-chainsmentioning

confidence: 99%

Hybridization effect in coupled metamaterials

Liu

Wang

et al. 2010

Front. Phys. China

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Although the invention of the metamaterials has stimulated the interest of many researchers and possesses many important applications, the basic design idea is very simple: composing effective media from many small structured elements and controlling its artificial EM properties. According to the effective-media model, the coupling interactions between the elements in metamaterials are somewhat ignored; therefore, the effective properties of metamaterials can be viewed as the "averaged effect" of the resonance property of the individual elements. However, the coupling interaction between elements should always exist when they are arranged into metamaterials. Sometimes, especially when the elements are very close, this coupling effect is not negligible and will have a substantial effect on the metamaterials' properties. In recent years, it has been shown that the interaction between resonance elements in metamaterials could lead to some novel phenomena and interesting applications that do not exist in conventional uncoupled metamaterials. In this paper, we will give a review of these recent developments in coupled metamaterials. For the "meta-molecule" composed of several identical resonators, the coupling between these units produces multiple discrete resonance modes due to hybridization. In the case of a "meta-crystal" comprising an infinite number of resonators, these multiple discrete resonances can be extended to form a continuous frequency band by strong coupling. This kind of broadband and tunable coupled metamaterial may have interesting applications. Many novel metamaterials and nanophotonic devices could be developed from coupled resonator systems in the future.

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“…The simulations were performed by using CSTMicrowave Studio: a full-wave solver based on finite integration method [27]. Among the earlier results, one should mention those obtained by Shamonina and co-workers, who were focused on coupling of metamaterial elements and developed theoretical models that explain effects, which eventually lead to magneto-inductive waves [28][29][30][31][32][33][34][35]. Here, we do not get into theoretical details and just briefly discuss the coupling effects.…”

Section: Analysis Of Coupling Of the Two Resonatorsmentioning

confidence: 99%

Radiation Properties and Coupling Analysis of a Metamaterial Based, Dual Polarization, Dual Band, Multiple Split Ring Resonator Antenna

Alıcı

Serebryannikov

Özbay

2010

Journal of Electromagnetic Waves and Applications

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Abstract-We demonstrate an electrically small antenna that operates at two modes, which correspond to two orthogonal polarizations.The antenna was single fed and composed of perpendicularly placed metamaterial elements and a monopole. One of the metamaterial elements was a multi split ring resonator (MSRR), and the other one was a split ring resonator (SRR). The elements' physical sizes were the same while the electrical sizes differed nearly by 1 GHz. This variety resulted in the dual mode operation at the 4.72 GHz and 5.76 GHz frequencies. When the antenna operated in the MSRR mode at 4.72 GHz for one polarization, it simultaneously operated for the SRR mode at 5.76 GHz, but for the perpendicular polarization. The efficiencies of the modes were 15% and 40%, and electrical sizes were λ/11.2 and λ/9.5, correspondingly. Finally, we numerically demonstrate the effect of coupling of the two resonators on the operation frequencies.

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Tailoring the near-field guiding properties of magnetic metamaterials with two resonant elements per unit cell

Cited by 66 publications

References 46 publications

Gain-Driven Discrete Breathers inPT-Symmetric Nonlinear Metamaterials

Gain-Driven Discrete Breathers inPT-Symmetric Nonlinear Metamaterials

Hybridization effect in coupled metamaterials

Radiation Properties and Coupling Analysis of a Metamaterial Based, Dual Polarization, Dual Band, Multiple Split Ring Resonator Antenna

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