Coupling of graphene and surface plasmons

Horing, Norman J. M.

doi:10.1103/physrevb.80.193401

Cited by 46 publications

(42 citation statements)

References 16 publications

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“…[30] to point out their generalization to include gapped graphene along with the previously discussed gapless results. In this regard, the graphene polarizability is also taken in the local limit with Π (0)…”

Section: General Formulation Of the Problemmentioning

confidence: 99%

“…As a matter of fact, this linear dependence of plasmon frequency on wave vector was initially attributed to local field corrections to the random-phase approximation. Horing 30 showed that when graphene is Coulomb-coupled to a conductor, the surface plasmon causes the low-frequency π-plasmon to have a linear dispersion. In this paper, we calculate the full dispersion relation for undamped plasmons in a hybrid monolayer graphene-conductor structure.…”

Section: Recent Research On Plasmon Excitationsmentioning

confidence: 99%

“…The self-consistent field structure for K(r, r ; ω) is determined, using the technique of Ref. [30]. In operator notation, the composite dielectric functionˆ and its inverse,K =ˆ −1 , for the 2D layer and semi-infinite substrate is given by adding their polarizabilitiesα 2D andα SI , respectively, i.e.,…”

Section: General Formulation Of the Problemmentioning

confidence: 99%

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Nonlocal plasma spectrum of graphene interacting with a thick conductor

2015

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Self-consistent field theory is used to obtain the non-local plasmon dispersion relation of monolayer graphene which is Coulomb-coupled to a thick conductor. We calculate numerically the undamped plasmon excitation spectrum for arbitrary wave number. For gapped graphene, both the lowfrequency (acoustic) and high frequency (surface) plasmons may lie within an undamped opening in the particle-hole region. Furthermore, we obtain plasmon excitations in a region of frequency-wave vector space which do not exist for free-standing gapped graphene.

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Section: General Formulation Of the Problemmentioning

confidence: 99%

Section: Recent Research On Plasmon Excitationsmentioning

confidence: 99%

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Nonlocal plasma spectrum of graphene interacting with a thick conductor

2015

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“…Moreover, they state that using graphene, may pave the way towards 'quantum plasmonics' [152]. The study of collective quantum effects in plasmas [153][154][155][156][157][158][159][160][161][162][163] and particularly in graphene [164][165][166] is a significant challenge that is likely to be the subject of intense research efforts in the future. Plasmas have been shown to be a very promising way to make graphenebased structures, the particular benefit is that they may be grown without the presence of a metal catalyst [148,167].…”

Section: Tailoring Metal Nanoarraysmentioning

confidence: 99%

Plasmas meet plasmonics

2012

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Abstract. The term 'plasmon' was first coined in 1956 to describe collective electronic oscillations in solids which were very similar to electronic oscillations/surface waves in a plasma discharge (effectively the same formulae can be used to describe the frequencies of these physical phenomena). Surface waves originating in a plasma were initially considered to be just a tool for basic research, until they were successfully used for the generation of large-area plasmas for nanoscale materials synthesis and processing. To demonstrate the synergies between 'plasmons' and 'plasmas', these large-area plasmas can be used to make plasmonic nanostructures which functionally enhance a range of emerging devices. The incorporation of plasmafabricated metal-based nanostructures into plasmonic devices is the missing link needed to bridge not only surface waves from traditional plasma physics and surface plasmons from optics, but also, more topically, macroscopic gaseous and nanoscale metal plasmas. This article first presents a brief review of surface waves and surface plasmons, then describe how these areas of research may be linked through Plasma Nanoscience showing, by closely looking at the essential physics as well as current and future applications, how everything old, is new, once again.

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“…According to Refs. [20,[69][70][71], the Fourier-transformed nonlocal composite inverse dielectric function can be determined by…”

Section: Hybrid Plasmon Modes and Damping In Open Silicene Systemsmentioning

confidence: 99%

Controlling plasmon modes and damping in buckled two-dimensional material open systems

Iurov

Gumbs

Huang

et al. 2017

Journal of Applied Physics

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Full ranges of both hybrid plasmon-mode dispersions and their damping are studied systematically by our recently developed mean-field theory in open systems involving a conducting substrate and a two-dimensional (2D) material with a buckled honeycomb lattice, such as silicene, germanene, and a group IV dichalcogenide as well. In this hybrid system, the single plasmon mode for a free-standing 2D layer is split into one acoustic-like and one optical-like mode, leading to a dramatic change in the damping of plasmon modes. In comparison with gapped graphene, critical features associated with plasmon modes and damping in silicene and molybdenum disulfide are found with various spin-orbit and lattice asymmetry energy bandgaps, doping types and levels, and coupling strengths between 2D materials and the conducting substrate. The obtained damping dependence on both spin and valley degrees of freedom is expected to facilitate measuring the open-system dielectric property and the spin-orbit coupling strength of individual 2D materials. The unique linear dispersion of the acoustic-like plasmon mode introduces additional damping from the intraband particle-hole modes which is absent for a free-standing 2D material layer, and the use of molybdenum disulfide with a large bandgap simultaneously suppresses the strong damping from the interband particle-hole modes.

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Coupling of graphene and surface plasmons

Cited by 46 publications

References 16 publications

Nonlocal plasma spectrum of graphene interacting with a thick conductor

Nonlocal plasma spectrum of graphene interacting with a thick conductor

Plasmas meet plasmonics

Controlling plasmon modes and damping in buckled two-dimensional material open systems

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