Waveguiding by a locally resonant metasurface

Maznev, A. A.; Gusev, V.

doi:10.1103/physrevb.92.115422

Cited by 51 publications

(30 citation statements)

References 37 publications

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“…Specifically, in our case, if a resonant mode from the pillars has the same polarization as a propagating mode in the main NW, they will hybridize and form two new modes (up and down branches) when their frequencies converge. This leads to the formation of mini band gaps, the widths of which depend on the coupling/hybridization strength as observed both in theoretical models [38][39][40][41], and experimentally [42,43] in acoustic metamaterials.…”

mentioning

confidence: 84%

Blocking Phonon Transport by Structural Resonances in Alloy-Based Nanophononic Metamaterials Leads to Ultralow Thermal Conductivity

et al. 2016

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mentioning

confidence: 84%

Blocking Phonon Transport by Structural Resonances in Alloy-Based Nanophononic Metamaterials Leads to Ultralow Thermal Conductivity

et al. 2016

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“…The value also confirms that the observed MSSWs are not driven by propagating surface acoustic waves (SAWs) in the GaAs substrate. Indeed, the SAWs velocity in a (001)-GaAs substrate is 2.7 km/s [51], which gives a maximum SAW frequency of 1.5 GHz at a wavenumber of 3.5 rad/µm. The value is well below the frequencies of the excited MSSWs.…”

Section: Reconstruction Of Mssw Dispersionmentioning

confidence: 99%

Optical Excitation of Propagating Magnetostatic Waves in an Epitaxial Galfenol Film by Ultrafast Magnetic Anisotropy Change

et al. 2019

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Using a time-resolved optically-pumped scanning optical microscopy technique we demonstrate the laser-driven excitation and propagation of spin waves in a 20-nm film of a ferromagnetic metallic alloy Galfenol epitaxially grown on a GaAs substrate. In contrast to previous all-optical studies of spin waves we employ laser-induced thermal changes of magnetocrystalline anisotropy as an excitation mechanism. A tightly focused 70-fs laser pulse excites packets of magnetostatic surface waves with an e −1 -propagation length of 3.4 µm, which is comparable with that of permalloy. As a result, laser-driven magnetostatic spin waves are clearly detectable at distances in excess of 10 µm, which promotes epitaxial Galfenol films to the limited family of materials suitable for magnonic devices. A pronounced in-plane magnetocrystalline anisotropy of the Galfenol film offers an additional degree of freedom for manipulating the spin waves' parameters. Reorientation of an in-plane external magnetic field relative to the crystallographic axes of the sample tunes the frequency, amplitude and propagation length of the excited waves. arXiv:1904.05171v2 [cond-mat.str-el]

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“…Important experimentally observable consequence of the coupling of two-dimensional atomic layer with elastic substrate is the appearance of the gapped resonance modes in the vibrational spectrum of the two-dimensional system of distributed oscillators on elastic substrate [33][34][35][36][37][38]. In Section II we use the value of the spectral gap in transverse oscillations of the monolayer on elastic substrate for the evaluation of the coupling strength of carbon, fluorine and chlorine atoms with nickel substrate.…”

Section: Introductionmentioning

confidence: 99%

Modeling of One-Side Surface Modifications of Graphene

Savin

Kosevich

2019

Materials

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We study the dependence of mechanical conformations of graphene sheets located on flat substrates on the density of unilateral (one-side) attachment of hydrogen, fluorine or chlorine atoms to them. It is shown that chemically modified graphene sheet can take four main forms on a flat substrate: the form of a flat sheet located parallel to the surface of the substrate, the form of convex sheet partially detached from the substrate with bent edges adjacent to the substrate, and the forms of single and double rolls on the substrate. On the surface of crystalline graphite, the flat form of the sheet is lowest in energy for hydrogenation density p < 0.21, fluorination density p < 0.20, and chlorination density p < 0.16. The surface of crystalline nickel has higher adsorption energy for graphene monolayer and the flat form of chemically modified sheet on such substrate is lowest in energy for hydrogenation density p < 0.47, fluorination density p < 0.30 and chlorination density p < 0.21. The flat shape of the graphene sheet remains basic on a substrate also when molecular groups CH3, CH2-CH3 or rings C6H5 are one-side attached to its outer surface. At the attachment density p = 1/6 (one group per 6 sheet atoms) the sheet becomes the nanocarpet the basis of which is formed by a sheet of graphene and the pile of which is formed by the attached molecular groups forming a tightly packed regular lattice. The addition of hydroxyl groups OH with attachment density p = 1/4 leads to the formation of hexagonal lattices of hydroxyl groups on the outer surface of graphene sheet on a substrate. In this lattice, the groups can form various configurations of hydrogen bonds, which turns the chemically modified sheet into a multistable system.

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Waveguiding by a locally resonant metasurface

Cited by 51 publications

References 37 publications

Blocking Phonon Transport by Structural Resonances in Alloy-Based Nanophononic Metamaterials Leads to Ultralow Thermal Conductivity

Blocking Phonon Transport by Structural Resonances in Alloy-Based Nanophononic Metamaterials Leads to Ultralow Thermal Conductivity

Optical Excitation of Propagating Magnetostatic Waves in an Epitaxial Galfenol Film by Ultrafast Magnetic Anisotropy Change

Modeling of One-Side Surface Modifications of Graphene

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