Robust Phonon-Plasmon Coupling in Quasifreestanding Graphene on Silicon Carbide

Koch, Roland; Fryska, S.; Ostler, Markus; Endlich, M.; Speck, Florian; Hänsel, T.; Schaefer, J.A.; Seyller, Thomas

doi:10.1103/physrevlett.116.106802

Cited by 36 publications

(27 citation statements)

References 38 publications

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“…In particular we consider a stacking of identical 1d massive Dirac plasma nano-ribbons (or quantum wires) placed parallel to each other in a plane, and a periodic array of parallel 2d massive Dirac plasma sheets. Similar systems made of parabolic dispersion and gapless Dirac plasma have been theoretically investigated earlier 18,[28][29][30]33 and experimentally demonstrated for graphene 8,9,11 . To describe the collective modes of such superstructures, we need to include the inter-ribbon or inter-layer Coulomb interactions, which leads to a coupling of all the layers due to the long range nature of Coulomb interactions.…”

Section: Plasmons In Metamaterials Made Of Massive Dirac Plasma mentioning

confidence: 54%

“…There have been several studies on plasmons in gapless two dimensional (2d) and three dimensional (3d) Dirac systems in the context of graphene [15][16][17][18][19] , topological insulators [20][21][22] , Weyl semimetals 23 , and in gapped 2d massive Dirac systems 24 in the context of buckled honeycomb structures such as silicene [25][26][27] . In addition to this plasmons in periodic arrays of parabolic systems [28][29][30][31] , and massless Dirac plasma layers [32][33][34] have also been investigated. A metamaterial made up of periodic graphene micro-ribbon arrays was used in Ref.…”

Section: Introductionmentioning

confidence: 99%

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Plasmon modes of a massive Dirac plasma, and their superlattices

et al. 2015

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We explore the collective density oscillations of a collection of charged massive Dirac particles, in one, two and three dimensions and their one dimensional superlattice. We calculate the long wavelength limit of the dynamical polarization function analytically, and use the random phase approximation to obtain the plasmon dispersion. The density dependence of the long wavelength plasmon frequency in massive Dirac systems is found to be different as compared to systems with parabolic, and gapless Dirac dispersion. We also calculate the long wavelength plasmon dispersion of a 1d metamaterial made from 1d and 2d massive Dirac plasma. Our analytical results will be useful for exploring the use of massive Dirac materials as electrostatically tunable plasmonic metamaterials and can be experimentally verified by infrared spectroscopy as in the case of graphene [Nat. Nanotechnol. 6, 630 (2011)].

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Section: Plasmons In Metamaterials Made Of Massive Dirac Plasma mentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Plasmon modes of a massive Dirac plasma, and their superlattices

et al. 2015

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“…Graphene and SiC have been extensively, but separately, studied for MIR and terahertz (THz) photonics, respectively [9,10]. The EG/SiC is an ideal platform for investigating exciting physics such as the coupling between graphene plasmons and optic phonons in SiC, which could lead to free-space IR light capture and onchip manipulation with low-losses and superior confinement [11,12]. However, the amount of experimental data is still limited in this field.…”

mentioning

confidence: 99%

Enhanced Mid -Infrared Reflectance with Graphene Coated Silicon Carbide Nanowires

Rufangura

Agrawal

Bosi³

et al. 2020

14th Pacific Rim Conference on Lasers and Electro-Optics (CLEO PR 2020)

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“…32 In the absence of external resonator, strong coupling between SPPs in a 2D material and surface phonons of the substrate has recently stimulated considerable interest. [33][34][35][36][37] Such a situation can not generally occur in the same crystal due to the screening of the ion charges by electrons. Nevertheless, exceptions exist as a result of the coupling between phonons and interband transitions.…”

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confidence: 99%

Enhancement of the Electron–Phonon Scattering Induced by Intrinsic Surface Plasmon–Phonon Polaritons

et al. 2019

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We investigate light-matter coupling in metallic crystals where plasmons coexist with phonons exhibiting large oscillator strength. We demonstrate theoretically that this coexistence can lead to strong light-matter interactions without external resonators.When the frequencies of plasmons and phonons are comparable, hybridization of these collective matter modes occurs in the crystal. We show that the coupling of these modes to photonic degrees of freedom gives rise to intrinsic surface plasmon-phonon polaritons, which offer the unique possibility to control the phonon properties by tuning the electron density and the crystal thickness. In particular, dressed phonons with reduced frequency and large wave vectors arise in the case of quasi-2D crystals, which leads to large enhancements of the electron-phonon scattering in the vibrational ultrastrong coupling regime. This suggests that photons can play a key role in determining the quantum properties of certain materials. A non-perturbative self-consistent Hamiltonian method is presented that is valid for arbitrarily large coupling strengths.

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Robust Phonon-Plasmon Coupling in Quasifreestanding Graphene on Silicon Carbide

Cited by 36 publications

References 38 publications

Plasmon modes of a massive Dirac plasma, and their superlattices

Plasmon modes of a massive Dirac plasma, and their superlattices

Enhanced Mid -Infrared Reflectance with Graphene Coated Silicon Carbide Nanowires

Enhancement of the Electron–Phonon Scattering Induced by Intrinsic Surface Plasmon–Phonon Polaritons

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