Limiting capabilities of two-dimensional plasmonics in electromagnetic wave detection

Mylnikov, Dmitry; Svintsov, Dmitry

doi:10.1103/physrevapplied.17.064055

“…A moderate resistivity of substrate (12 Ω·cm, B-doped Si) ensured its transparency. A specially designed wide-band terahertz bow-tie antenna was connected to source and drain contacts. The polarization of the light was set along the axis of the bow-tie antenna.…”

mentioning

confidence: 99%

Terahertz Photoconductivity in Bilayer Graphene Transistors: Evidence for Tunneling at Gate-Induced Junctions

Mylnikov

¹

,

Titova

²

,

Kashchenko

³

et al. 2022

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Photoconductivity of novel materials is the key property of interest for design of photodetectors, optical modulators, and switches. Despite the photoconductivity of most novel 2d materials having been studied both theoretically and experimentally, the same is not true for 2d p–n junctions that are necessary blocks of most electronic devices. Here, we study the sub-terahertz photocoductivity of gapped bilayer graphene with electrically induced p–n junctions. We find a strong positive contribution from junctions to resistance, temperature resistance coefficient, and photoresistivity at cryogenic temperatures T ∼ 20 K. The contribution to these quantities from junctions exceeds strongly the bulk values at uniform channel doping even at small band gaps of ∼10 meV. We further show that positive junction photoresistance is a hallmark of interband tunneling, and not of intraband thermionic conduction. Our results point to the possibility of creating various interband tunneling devices based on bilayer graphene, including steep-switching transistors and selective sensors.

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“…Some theoretical works for studying the elliptical form of plasmonic cavity were performed 15 , 16 . Much fewer papers are devoted to the plasmon excitation in a rectangular 2DES (including graphene) cavity 17 – 19 . A rectangular 2DES cavity has a reduced symmetry as compared to disk (or ring) geometry and therefore the theoretical consideration becomes more complex.…”

Section: Introductionmentioning

confidence: 99%

“…A rectangular 2DES cavity has a reduced symmetry as compared to disk (or ring) geometry and therefore the theoretical consideration becomes more complex. Theoretical approaches applied for studying the plasmon excitations in rectangular 2DES cavities employ either commercial numerical solvers 17 , 19 , 20 or use simplifying approximations 18 .…”

Section: Introductionmentioning

confidence: 99%

Complete electromagnetic consideration of plasmon mode excitation in graphene rectangles by incident terahertz wave

Mashinsky,

Popov,

Fateev

2024

Sci Rep

1

0

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The excitation of terahertz plasmon modes in a graphene rectangle by normally incident linearly polarized electromagnetic wave has been theoretically studied. The complete electromagnetic approach based on formulation of the integral equations for sought-for electromagnetic quantities has been developed. The influence of edge-field effects on excitation of plasmon modes for different polarization of the incident wave and different shapes of graphene rectangle has been studied. The absorption cross-section spectra and the charge density distributions in graphene rectangle for different plasmon modes have been studied. It has been found that the edge-field effect, which results in spreading the plasmon field beyond the geometric boundaries of graphene rectangle, leads to considerable red shifts of the plasmon mode frequencies and modifies the plasmon mode dispersion.

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“…The ultimately most symmetrical shape of 2DES cavity in the form of circular disk (and ring) has been studied [9][10][11][12][13][14]. Much fewer papers are devoted to the plasmon excitation in a rectangular 2DES (including graphene) cavity [15][16][17]. A rectangular 2DES cavity has a reduced symmetry as compared to disk (or ring) geometry and therefore the theoretical consideration becomes more complex.…”

mentioning

confidence: 99%

“…A rectangular 2DES cavity has a reduced symmetry as compared to disk (or ring) geometry and therefore the theoretical consideration becomes more complex. Theoretical approaches applied for studying the plasmon excitations in rectangular 2DES cavities employ either commercial numerical solvers [15,17,18] or use simplifying approximations [16].…”

mentioning

confidence: 99%

Complete electromagnetic consideration of plasmon mode excitation in graphene rectangles by incident terahertz wave

Mashinsky,

Popov,

Fateev

2023

Preprint

0

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The excitation of terahertz plasmon modes in a graphene rectangle by normally incident linearly polarized electromagnetic wave has been theoretically studied. The complete electromagnetic approach based on formulation of the integral equations for sought-for electromagnetic quantities has been developed. The influence of edge-field effects on excitation of plasmon modes for different polarization of the incident wave and different shapes of graphene rectangle has been studied. The absorption cross-section spectra and the charge density distributions in graphene rectangle for different plasmon modes have been studied. It has been found that the edge-field effect, which results in spreading the plasmon field beyond the geometric boundaries of graphene rectangle, leads to considerable red shifts of the plasmon mode frequencies and modifies the plasmon mode dispersion.

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Limiting capabilities of two-dimensional plasmonics in electromagnetic wave detection

Cited by 9 publications

References 55 publications

Terahertz Photoconductivity in Bilayer Graphene Transistors: Evidence for Tunneling at Gate-Induced Junctions

Terahertz Photoconductivity in Bilayer Graphene Transistors: Evidence for Tunneling at Gate-Induced Junctions

Complete electromagnetic consideration of plasmon mode excitation in graphene rectangles by incident terahertz wave

Complete electromagnetic consideration of plasmon mode excitation in graphene rectangles by incident terahertz wave

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