Tunable surface plasmon instability leading to emission of radiation

Gumbs, Godfrey; Iurov, Andrii; Huang, Danhong; Pan, W.

doi:10.1063/1.4927101

Cited by 22 publications

(16 citation statements)

References 55 publications

(82 reference statements)

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“…Using the data presented in Figs. 4b and 4c, it is easy to show that, instead of conditions (13) and (14), we now obtain (15) where the signs plus and minus refer to the positive and negative energy regions, respectively. For e < 0, we have < and < .…”

Section: Flat Epitaxial Layersmentioning

confidence: 96%

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Two-dimensional hexagonal layers of A N B 8–N compounds on semiconductors

Davydov

2016

Phys. Solid State

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Using the parabolic model of the electronic spectrum of the substrate and the low-energy approximation of the dispersion law for two-dimensional hexagonal compounds A N B 8 -N , the density of states of an epitaxial layer has been investigated as a function of the band gap of the substrate, the band gap of the graphene-like compound in a free-standing state, their mutual arrangement, and the dimensionless "layersubstrate" coupling constant C. It has been shown that, when the coupling constant C exceeds critical values, the density of states of the epitaxial layer undergoes qualitative changes. Both flat and buckled epitaxial layers have been considered. Estimates of the charge redistribution due to the transformation of the density of states of the graphene-like compound have been presented.

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Section: Flat Epitaxial Layersmentioning

confidence: 96%

“…In recent years, considerable attention has been paid to the theoretical description of graphene-like compounds [1][2][3][4][5][6][7][8] and related layered structures [9][10][11][12][13][14][15]. In contrast to gapless graphene, silicene, and germanene, binary compounds A N B 8 -N (A ≠ B) in a freestanding state have a band gap.…”

Section: Introductionmentioning

confidence: 99%

Two-dimensional hexagonal layers of A N B 8–N compounds on semiconductors

Davydov

2016

Phys. Solid State

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“…Creating pristine graphene in commercial quantities with a specific band gap is a major challenge in its use for nanoelectronic devices. Some of the intriguing properties which have received a great deal of attention include the doping and temperature dependence of plasmon excitations and their energy dispersion dependence on the direction of the wave vector in the Brillouin zone for graphene [10][11][12][13][14][15], the Klein paradox [16][17][18][19], the Veselago lens [19][20][21], screened impurity potential [22,23], effect of magnetic field [22] to name just a few.…”

Section: Introductionmentioning

confidence: 99%

Adatom doping-enriched geometric and electronic properties of pristine graphene: a method to modify the band gap

et al. 2017

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We have investigated the way in which the concentration and distribution of adatoms affect the geometric and electronic properties of graphene. Our calculations were based on the use of first principle under the density functional theory which reveal various types of π-bonding. The energy band structure of this doped graphene material may be explored experimentally by employing angle-resolved photo-emission spectroscopy (ARPES) for electronic band structure measurements and scanning tunneling spectroscopy (STS) for the density-of-states (DOS) both of which have been calculated and reported in this paper. Our calculations show that such adatom doping is responsible for the destruction or appearance of the Dirac cone structure. PACS numbers: 65.80.Ck, 68.65.P q, 72.80.V p and 77.84.Bw * "This paper is dedicated to Professor Lou Massa on the occasion of his Festschrift: A Path through Quantum Crystallography". 1 arXiv:1703.02491v1 [cond-mat.mes-hall]

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“…However, in practice, the strong electron-hole scattering in 3-dimensional systems suppresses the counterstreaming motion of the electrons and holes. Several groups have theoretically investigated two-stream instabilities in coupled two-dimensional structures such as closely spaced electron and hole doped quantum wells to separate the oppositely charged carriers [6][7][8][9][10][11][12][13][14][15][16]. However, even in these systems with reduced electron-hole scattering due to the spatial separation between the two carrier species, the strength of electric fields necessary to obtain sufficient large relative drift velocities of the electron and hole populations would cause heating of the carriers that suppresses the instability.…”

Section: Introductionmentioning

confidence: 99%

Plasma wave instabilities in nonequilibrium graphene

Aryal

Jauho

2016

Phys. Rev. B

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We study two-stream instabilities in a nonequilibrium system in which a stream of electrons is injected into doped graphene. As with equivalent nonequilibrium parabolic band systems, we find that the graphene systems can support unstable charge-density waves whose amplitudes grow with time. We determine the range of wave vectors q that are unstable, and their growth rates. We find no instability for waves with wave vectors parallel or perpendicular to the direction of the injected carriers. We find that, within the small-wave-vector approximation, the angle between q and the direction of the injected electrons that maximizes the growth rate increases with increasing |q|. We compare the range and strength of the instability in graphene to that of twoand three-dimensional parabolic band systems.

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Tunable surface plasmon instability leading to emission of radiation

Abstract: Articles you may be interested inGraphene-based terahertz tunable plasmonic directional coupler Appl. Phys. Lett. 105, 081903 (2014); 10.1063/1.4894090Plasmon-enhanced terahertz emission from a semiconductor/metal interface Appl. Phys. Lett.

Cited by 22 publications

References 55 publications

Two-dimensional hexagonal layers of A N B 8–N compounds on semiconductors

Two-dimensional hexagonal layers of A N B 8–N compounds on semiconductors

Adatom doping-enriched geometric and electronic properties of pristine graphene: a method to modify the band gap

Plasma wave instabilities in nonequilibrium graphene

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