A flexible control on electromagnetic behaviors of graphene oligomer by tuning chemical potential

Ren, Junbo; Wang, Guangqing; Qiu, Weibin; Chen, Houbo; Qiu, Pingping; Kan, Qiang; Pan, Jiaoqing

doi:10.1186/s11671-018-2762-4

Cited by 4 publications

(3 citation statements)

References 30 publications

(26 reference statements)

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“…According to Kubo's formula [29,30], graphene's surface conductivity is composed of the contributions from interband electron-electron transition and the intraband electron-photon scattering.…”

Section: Model Of the Plasmonic Talbot Effect And Calculation Methodsmentioning

confidence: 99%

Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Zhou

et al. 2020

Applied Sciences

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In this article, the plasmonic Talbot effect supported by a graphene monolayer is investigated theoretically when surface plasmon polaritons (SPPs) are excited on the graphene. The Talbot effect distance is studied by varying the chemical potential, wavelength and the period of grating. The Talbot distance increases with the period in a parabolic way, and exhibits the opposite trends with respect to the chemical potential and wavelength. Moreover, the full width at half maximum (FWHM) of the Talbot image is recorded as a function of chemical potential and the wavelength. This study provides a new approach for sub-wavelength scale imaging and extends the applications of Talbot effect as well as graphene-based plasmonic devices.

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Section: Model Of the Plasmonic Talbot Effect And Calculation Methodsmentioning

confidence: 99%

Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Zhou

et al. 2020

Applied Sciences

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“…These phenomena are relative to the effective refractive index of graphene. The effective refractive index of graphene presents a tendency to decrease as the chemical potential increases [28]. Therefore, the ability of the central graphene nanodisk to confine the incident light is weakened.…”

Section: The Effect Of the Chemical Potential Of The Central Nanodiskmentioning

confidence: 99%

“…Fortunately, the graphene-guided SPPs wave shows lower ohmic loss and higher electromagnetic field confinement ability. Furthermore, the greatest advantage is the frequency tunability due to the modification of the chemical potential of the graphene [28]. Therefore, it is predicted that graphene-based PMs possess fantastic properties compared to their noble metal counterparts.…”

Section: Introductionmentioning

confidence: 99%

Effect of Nanodisks at Different Positions on the Fano Resonance of Graphene Heptamers

et al. 2019

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The formation of Fano resonance based on graphene heptamers with D6h symmetry and the effect of nanoparticles at different positions on the collective behavior are investigated in this paper. The significances of central nanodisks on the whole structure are studied first by varying the chemical potential. In addition, the effect of six graphene nanodisks placed in the ring on collective behaviors is also investigated. The influence of the nanodisks at different positions of the ring on the Fano resonance spectrum of the whole oligomer is researched by changing the chemical potential and radius. The proposed nanostructures may find broad applications in the fields of chemical and biochemical sensing.

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Chiral graphene plasmonic Archimedes’ spiral nanostructure with tunable circular dichroism and enhanced sensing performance

Zhou¹,

Su²,

Ma³

et al. 2020

Opt. Express

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Circular dichroism spectroscopy is frequently used to characterize the chiral biomolecules by measuring the absorption spectra contrast between the left-handed circularly polarized light and the right-handed circularly polarized light. Compared with biomolecules, chiral metal plasmonic nanostructures also produce a strong circular dichroism response in the range of near-infrared. However, due to the large damping rate, the non-adjustable resonant frequency of the conventional metals, the applications of chiral metal plasmonic nanostructures in the fields of photoelectric detection and chemical and biochemical sensing are restricted. Here, we present a chiral graphene plasmonic Archimedes’ spiral nanostructure that displays a significant circular dichroism response under the excitation of two polarizations of circularly polarized light. By manipulating the material and geometric parameters of the Archimedes’ spiral, the stronger circular dichroism responses and modulation of the resonant wavelength are achieved. The optimized plasmonic nanostructure has outstanding refractive index sensing performance, where the sensitivity and figure of merit reach 7000nm/RIU and 68.75, respectively. Our proposed chiral graphene plasmonic Archimedes’ spiral nanostructure might find potential applications in the fields of optical detection and high performance of index sensing.

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A flexible control on electromagnetic behaviors of graphene oligomer by tuning chemical potential

Cited by 4 publications

References 30 publications

Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Tunable Plasmonic Talbot Effect Based on Graphene Monolayer

Effect of Nanodisks at Different Positions on the Fano Resonance of Graphene Heptamers

Chiral graphene plasmonic Archimedes’ spiral nanostructure with tunable circular dichroism and enhanced sensing performance

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