Near-infrared tunable surface plasmon resonance sensors based on graphene plasmons <i>via</i> electrostatic gating control

Xiao, Yongguang; Zhong, Yi; Luo, Yunhan; Zhang, Jun; Chen, Yaofei; Liu, Gui-Shi; Yu, Jianhui

doi:10.1039/d1ra06807e

Cited by 5 publications

(4 citation statements)

References 59 publications

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“…Gate voltage between the Au layer and the graphene film as well as the attachment of bio molecules can exert the independent and superimposable doping effect on graphene [46]: the gate voltage can adjust the chemical potential (absolute value) in graphene to a suitable value (near ENZ point), causing the graphene to undergo plasmon resonance; the attachment of biomolecules can cause further changes in the chemical potential through charge transfer (or electrostatic gating), thereby shifting the resonance wavelength or resonance angle of the incident light. Compared with the Otto prism coupling structure in our previous work [47], the Kretschmann configuration has the advantage of no restriction on the analyte layer thickness. The Au layer is adopted for playing the role of gating electrode.…”

Section: Sample Design and Numerical Methodsmentioning

confidence: 99%

“…It can greatly reduce the difficulty of preparation compared with the structure of double graphene films separated by a dielectric layer. The Au layer can be deposited on a substrate that is Compared with the Otto prism coupling structure in our previous work [47], the Kretschmann configuration has the advantage of no restriction on the analyte layer thickness. The Au layer is adopted for playing the role of gating electrode.…”

Section: Sample Design and Numerical Methodsmentioning

confidence: 99%

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Theoretical Design of Near-Infrared Tunable Surface Plasmon Resonance Biosensors Based on Gate-Controlled Graphene Plasmons

Xiao,

Cui,

Zhong

et al. 2023

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A tunable near-infrared surface plasmon resonance (SPR) biosensor based on gate-controlled graphene plasmons is numerically investigated by using the finite element method (FEM) and the transfer matrix method (TMM). The novel properties of chemical potential sensing make the proposed sensor promising in the application of ultra-sensitive and highly specific biosensing technology. The sensitivity of chemical potential sensing in wavelength interrogation mode can be calculated to be 1.5, 1.89, 2.29, 3.21, 3.73 and 4.68 nm/meV, respectively, at the resonance wavelengths of 1100, 1200, 1310, 1550, 1700 and 1900 nm. The figure of merit (FOM) achieves 129.3, 101.1, 84.5, 67.7, 69.5 and 59.7 eV−1, respectively, at these resonance wavelengths. The sensitivity of chemical potential sensing in gate voltage interrogation mode also can be calculated to be 156.9822, 143.6147, 131.0779, 111.0351, 101.3415 and 90.6038 mV/meV, respectively, at the incident wavelengths of 1100, 1200, 1310, 1550, 1700 and 1900 nm. The FOM achieves 135.6, 103.0, 88.9, 62.2, 66.6 and 61.5 eV−1, respectively, at these incident wavelengths. Theoretical estimates suggest that the limit of detection (LOD) of the sensor’s DNA sensing can reach the level of femtomolar or even attomolar, comparable to and even lower than that of 2D nanomaterial-enhanced metal SPR sensors with AuNPs as a sensitivity enhancement strategy. The feasibility of preparation and operation of this new concept SPR biosensor is also analyzed and discussed.

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Section: Sample Design and Numerical Methodsmentioning

confidence: 99%

Section: Sample Design and Numerical Methodsmentioning

confidence: 99%

Theoretical Design of Near-Infrared Tunable Surface Plasmon Resonance Biosensors Based on Gate-Controlled Graphene Plasmons

Xiao,

Cui,

Zhong

et al. 2023

Coatings

Self Cite

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“…Indeed, in previous research works, [50][51][52][53][54][55][56][57] the Fermi level of graphene-based configurations has been tuned using the electrical gating effect, which allows tuning of the plasmon resonance. However, in the current work, the Fermi level is tuned not by the gating effect but through the arrangement of various densities of Li atoms on the graphene surface.…”

Section: Im[1∕(𝜀mentioning

confidence: 99%

Modulating Optical Properties of Graphene with the help of Two‐Dimensional Metal‐Organic Networks

Abbasian

2023

Advcd Theory and Sims

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We utilize density functional theory to explore dicarbonitrile‐polyphenyl networks overlaid on graphene as a method for manipulating the density of Li atoms in a specific assembly pattern. Ab initio molecular dynamics calculations affirm the thermal stability of the introduced systems. We scrutinized the electronic structure and optical properties of the resultant systems, illustrating a systematic modulation of optical characteristics. Our results suggest that the optical excitation frequencies of (Li‐dicarbonitrile‐polyphenyl)/G can be efficiently tuned by systematically adjusting the density of Li atoms on graphene.

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“…Moreover, localized surface plasmons of graphene supported by graphene nanodisks have been experimentally demonstrated at 2 μm by using a fully scalable block copolymer self-assembly method [12]. Furthermore, controlling graphene chemical doping methods can lead to NIR tunable graphene plasmonic devices [13,14].…”

Section: Introductionmentioning

confidence: 99%

Near-infrared switching between slow and fast light in the metal nanoparticles-graphene nanodisks-quantum dots hybrid systems

Tohari¹

2022

Phys. Scr.

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Graphene-based nanocomposites have recently attracted much interest due to the unique properties of graphene plasmons paving the way to promising potential applications. We study the near-infrared linear optical properties of the metal nanoparticle-graphene nanodisk- quantum dot hybrid system by numerically solving the equation of motion for the density matrix elements that describe the dynamics of the system where the quantum dot is modeled as a three-level atomic system of Λ conﬁguration interacting with a weak probe ﬁeld and strong control ﬁeld. We obtain a strong switching between slow and fast light near resonance can be controlled by the distances between the components of the system, the size of metal nanoparticle as well as the Rabi frequency of the control ﬁeld. Moreover, the proposed hybrid plasmonic system shows a signiﬁcant ampliﬁcation without population inversion can be eﬀectively monitored by strength of the control ﬁeld. Thus, we think that the metal nanoparticle-graphene nanodisk- quantum dot hybrid system has potential applications in communication, sensing, imaging, signal processing and optoelectronics devices.

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Near-infrared tunable surface plasmon resonance sensors based on graphene plasmons via electrostatic gating control

Abstract: A tunable near-infrared surface plasmon resonance sensor based on graphene plasmons via electrostatic gating control is investigated theoretically.

Cited by 5 publications

References 59 publications

Theoretical Design of Near-Infrared Tunable Surface Plasmon Resonance Biosensors Based on Gate-Controlled Graphene Plasmons

Theoretical Design of Near-Infrared Tunable Surface Plasmon Resonance Biosensors Based on Gate-Controlled Graphene Plasmons

Modulating Optical Properties of Graphene with the help of Two‐Dimensional Metal‐Organic Networks

Near-infrared switching between slow and fast light in the metal nanoparticles-graphene nanodisks-quantum dots hybrid systems

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