Design of a tunable graphene plasmonic-on-white graphene switch at infrared range

Farmani, Ali; Zarifkar, Abbas; Sheikhi, Mohammad Hossein; Miri, Mehdi

doi:10.1016/j.spmi.2017.09.051

Cited by 97 publications

(26 citation statements)

References 44 publications

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“…Plasmonic surface have to provide high ratio of surface-to-volume and during connection between functional groups show a good biocompatibility. Moreover in metal based substrate cost of the material considered as a significant factor [67][68][69]. In the following figure, some traditional plasmonics materials for biosensing is provided .…”

Section: Plasmonics Metamaterialsmentioning

confidence: 99%

Monitoring Biomaterials with Light: Review of Surface Plasmon Resonance Biosensing Using two Dimensional Materials

Yari¹,

Farmani²,

Farmani³

et al. 2021

Preprint

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The purpose of this paper is to present advanced techniques in optical biodevices. Moreover different configurations involving the generation of fiber optical biosensors are described. To overcome some limitations of fiber optical biosensors, plasmonic phenomena proposed. In addition novel plasmonic phenomena have broaden researcher’s horizons in new discovering in terms of technology and application. As regards there are many challenges to detect ultra-low concentration samples with high sensitivity in real time. Researchers have always made great efforts to discover more effective methods. Throughout the paper SPR and LSPR as a powerful analysis instrument are introduced. Finally surveys the current practical performances of plasmonic sensors in detection of bio target are provided. As a result these devices demonstrate great potential in identifying target analytic due to their unique optical biosensors.

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Section: Plasmonics Metamaterialsmentioning

confidence: 99%

Monitoring Biomaterials with Light: Review of Surface Plasmon Resonance Biosensing Using two Dimensional Materials

Yari¹,

Farmani²,

Farmani³

et al. 2021

Preprint

Self Cite

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“…In this stream, the conductivity of graphene can be deduced by Kabou equation [34]- [35]. The complex-valued surface conductivity σ g (ω) of graphene is determined by the well-established and experimentally valid theoretical model, which makes it to be the algebraic sum of the intra-and inter-band conductivities [22], i.e., σ g (ω) = σ i ntra (ω) + σ i nter (ω)…”

Section: Model and Theorymentioning

confidence: 99%

“…Propagation of graphene plasmons can be controlled by modulating the external electrical field, and also, the environmental temperature. It has been shown that strong coupling between the incident waves and the graphene plasmons can yield the ways to realize optical switching [22]. Zeng et al experimentally demonstrated frequency-tunable ultra-high speed intensity modulation in the midinfrared regime exploiting hybrid graphene metasurface [23].…”

Section: Introductionmentioning

confidence: 99%

Tunable Plasmon Induced Transparency in Graphene and Hyperbolic Metamaterial-Based Structure

et al. 2019

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A specially designed tunable hyperbolic metamaterial (HMM) based on plasmon induced transparency (PIT) of fractal in the near-infrared (NIR) regime was proposed. The HMM-layer constitutes the top metasurface, which is comprised of fractal-like nanospheres of silver (Ag) metal. A bilayer of graphene is sandwiched between the top HMM and bottom silicon (Si) substrate. The permittivity of graphene bilayer was deduced corresponding to different chemical potentials (of graphene). PIT of the proposed structure was obtained in the 3000-4000 nm wavelength band by employing the finite difference time domain simulation under the excitation of a fundamental transverse magnetic (TM) mode. The effects of incidence angle and graphene chemical potential on the transmission characteristics were investigated. Furthermore, the PIT windows could be tuned by altering the radii of Ag nanospheres in the HMM layer and chemical potential of bilayer graphene. Such systems would be useful in varieties of applications, e.g., switching, energy harvesting, sensing in environmental, and/or medical diagnostics, particularly in detecting the existing impurities in human blood and urine.

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“…Proposed in that paper plasmonic switch supports transverse magnetic and transverse electric graphene plasmons whose propagation characteristics could be controlled by modulating the external electric field and the temperature of graphene. Plasmonic splitter based on two different metal-insulator-metal waveguides with periodic grooves and a subwavelength slit was proposed and theoretically studied in [27]. Terahertz tunable plasmonic directional coupler based on a graphene and a thin metal film with a nanoscale slit was proposed in [14].…”

Section: Introductionmentioning

confidence: 99%

Electrically Controllable Active Plasmonic Directional Coupler of Terahertz Signal based on a Periodical Dual Grating Gate Graphene Structure

Morozov

Попов

Fateev

2021

Preprint

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We propose a concept of an electrically controllable plasmonic directional coupler of terahertz signal based on a periodical structure with an active (with inversion of the population of free charge carriers) graphene with a dual grating gate and numerically calculate its characteristics. Proposed concept of plasmon excitation by using the grating gate offers highly effective coupling of incident electromagnetic wave to plasmons as compared with the excitation of plasmons by a single diffraction element. The coefficient which characterizes the efficiency of transformation of the electromagnetic wave into the propagating plasmon has been calculated. This transformation coefficient substantially exceeds the unity (exceeding 6 in value) due to amplification of plasmons in the studied structure by using pumped active graphene. We have shown that applying different dc voltages to different subgratings of the dual grating gate allows for exciting the surface plasmon in graphene, which can propagate along or opposite the direction of the structure periodicity, or can be a standing plasma wave for the same frequency of the incident terahertz wave. The coefficient of unidirectionality, which is the ratio of the plasmon power flux propagating along (opposite) the direction of the structure periodicity to the sum of the absolute values of plasmon power fluxes propagating in both directions, could reach up to 80 percent. Two different methods of the plasmon propagation direction switching are studied and possible application of the found effects are suggested.

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Design of a tunable graphene plasmonic-on-white graphene switch at infrared range

Cited by 97 publications

References 44 publications

Monitoring Biomaterials with Light: Review of Surface Plasmon Resonance Biosensing Using two Dimensional Materials

Monitoring Biomaterials with Light: Review of Surface Plasmon Resonance Biosensing Using two Dimensional Materials

Tunable Plasmon Induced Transparency in Graphene and Hyperbolic Metamaterial-Based Structure

Electrically Controllable Active Plasmonic Directional Coupler of Terahertz Signal based on a Periodical Dual Grating Gate Graphene Structure

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