Multilayer-graphene-based amplifier of surface acoustic waves

Yurchenko, Stanislav O.; Komarov, Kirill A.; Пустовойт, В. И.

doi:10.1063/1.4921565

Cited by 18 publications

(13 citation statements)

References 39 publications

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“…Theoretical studies predict a range of rich physical phenomena arising from SAW-graphene interactions [14][15][16][17], and graphene's potential as an extraordinarily responsive sensing material [18] is being exploited for the development of SAW sensors. For example, SAW devices that are responsive to hydrogen and carbon monoxide [19], and moisture [20][21][22][23] have been reported.…”

Section: Introductionmentioning

confidence: 99%

Controlling the properties of surface acoustic waves using graphene

Bandhu

Nash

2015

Nano Res.

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Surface acoustic waves (SAWs) are elastic waves that propagate on the surface of a solid, much like waves on the ocean, with SAW devices used widely in communication and sensing. The ability to dynamically control the properties of SAWs would allow the creation of devices with improved performance or new functionality. However, so far it has proved extremely difficult to develop a practical way of achieving this control. In this paper we demonstrate voltage control of SAWs in a hybrid graphene-lithium niobate device. The velocity shift of the SAWs was measured as the conductivity of the graphene was modulated using an ion-gel gate, with a 0.1% velocity shift achieved for a bias of approximately 1 V. This velocity shift is comparable to that previously achieved in much more complicated hybrid semiconductor devices, and optimization of this approach could therefore lead to a practical, cost-effective voltage-controlled velocity shifter. In addition, the piezoelectric fields associated with the SAW can also be used to trap and transport the charge carriers within the graphene. Uniquely to graphene, we show that the acoustoelectric current in the same device can be reversed, and switched off, using the gate voltage.

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Section: Introductionmentioning

confidence: 99%

Controlling the properties of surface acoustic waves using graphene

Bandhu

Nash

2015

Nano Res.

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“…In multilayer-graphene-based system, Yurchenko et. al., [16] obtained amplification in the hydrodynamic regime ql << 1 in a collisionless system with condition 2V D > V S . Dagher, et.…”

Section: Introductionmentioning

confidence: 94%

Hypersound Absorption of Acoustic Phonons in a Degenerate Carbon Nanotube

Dompreh

Mensah²,

Mensah³

et al. 2015

Graphene

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We present a theoretical study of acoustic phonons amplification in Carbon Nanotubes (CNT). The phenomenon is via Cerenkov emission (CE) of acoustic phonons using intraband transitions proposed by Mensah et. al., [1] in Semiconductor Superlattices (SSL) and confirmed in [2]. From this, an asymmetric graph of Γ CN T on V d Vs and Ωτ were obtained where amplification (Γ CN T amp ) >> absorption (Γ CN T abs ). The ratio, |Γ CN T amp | |Γ CN T abs | ≈ 3.5, at V d = 1.02V s , ω q = 3.0 THz and T = 85 K for scattering angle θ > 0 . A threshold field at which Γ CN T abs switches over to Γ CN Tamp was calculated to be E dc z = 6.2 × 10 3 V/m. This field is far less than that deduced using Bloch-Type Oscillation (BTO) [3] which is E dc BT O = 3.0 × 10 5 V/m. The obtained Γ CN T amp would enable the use of CNT for the production of SASER.

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“…Re-fabricating the structure is not necessary anymore. There have been many applications based on graphene, including absorbers [ 21 ], electro-optical switches [ 22 ], field-effect transistors [ 23 ], amplifiers [ 24 ], diodes [ 25 ], terahertz antennas [ 26 ], filters [ 27 ], mixers [ 28 ], plasmonic Bragg reflectors [ 29 ], and so on. A graphene-based plasmonic analog to EIT nanostructures has already been numerically illustrated by Shi et al [ 30 ].…”

Section: Introductionmentioning

confidence: 99%

Tunable Multiple Plasmon-Induced Transparencies Based on Asymmetrical Grapheme Nanoribbon Structures

Wang

Yan

et al. 2017

Materials

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We present plasmonic devices, consisting of periodic arrays of graphene nanoribbons (GNRs) and a graphene sheet waveguide, to achieve controllable plasmon-induced transparency (PIT) by numerical simulation. We analyze the bright and dark elements of the GNRs and graphene-sheet waveguide structure. Results show that applying the gate voltage can electrically tune the PIT spectrum. Adjusting the coupling distance and widths of GNRs directly results in a shift of transmission dips. In addition, increased angle of incidence causes the transmission to split into multiple PIT peaks. We also demonstrate that PIT devices based on graphene plasmonics may have promising applications as plasmonic sensors in nanophotonics.

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Multilayer-graphene-based amplifier of surface acoustic waves

Cited by 18 publications

References 39 publications

Controlling the properties of surface acoustic waves using graphene

Controlling the properties of surface acoustic waves using graphene

Hypersound Absorption of Acoustic Phonons in a Degenerate Carbon Nanotube

Tunable Multiple Plasmon-Induced Transparencies Based on Asymmetrical Grapheme Nanoribbon Structures

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