Manipulating light absorption of graphene using plasmonic nanoparticles

Zhu, Jinfeng; Liu, Qing; Lin, Tim

doi:10.1039/c3nr02660d

Cited by 80 publications

(43 citation statements)

References 23 publications

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“…Thus, for a given dielectric substrate, one can easily alter the Fermi level of the graphene flake only by changing the bias voltage V B . Moreover, the performance of graphene gets significantly enhanced when placed in the strong localized electric field of plasmonic nanostructures [41]. Here, using these concepts, we demonstrate the dynamic control of plasmon resonance for the substrate-supported gold nanocube.…”

Section: Dynamic Tunability Of the Optical Responses Using Graphene Omentioning

confidence: 96%

Substrate-Mediated Broadband Tunability in Plasmonic Resonances of Metal Nanoantennas on Finite High-Permittivity Dielectric Substrate

et al. 2015

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We investigate the optical response of a gold nanocube antenna supported by a high-permittivity dielectric nanocuboid substrate and propose schemes for broadband tailoring of its plasmonic resonances via alteration in image-charge screening. Based on finite-elementmethod (FEM) simulations-in agreement with filteredcoupled-dipole-approximations (FCDA)-we explore the tunability and spectral evolution of the substrate-supported nanocube's hybridized plasmon modes as functions of the relative permittivity and dimensions of the dielectric substrate. Besides numerical calculations, we also derive simple analytical expressions using image-charge theory to readily estimate the resonance spectral shift-gauging the intense particle-substrate interaction-for a substratesupported nanocube. Strong localized electric field, around the nanocube's vertices and edges near the substrate, is observed due to the image charges induced in the substrate by the coupled bonding mode arising from hybridization of the primitive dipolar and quadrupolar modes of the nanocube. By introducing slots on the dielectric substrate in the areas around the nanocube's edges where electric field is highly concentrated, we achieve substrate's surfacemediated wideband tunability of plasmonic resonance as functions of the geometric parameters of the slots while maintaining the overall dimensions and material of the nanocuboid substrate. These slots enable dynamic tunability of plasmon resonance by placing graphene flakes on them, which facilitates electrical tailoring of nanocube's plasmon resonance over visible and near-infrared regions. Thus, these proposed schemes would allow one to widely tune the optical responses of any plasmonic nanoantennas using a slotted finite high-permittivity-dielectric substrate for numerous applications in nanophotonic integrated circuits and plasmonic devices.

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Section: Dynamic Tunability Of the Optical Responses Using Graphene Omentioning

confidence: 96%

Substrate-Mediated Broadband Tunability in Plasmonic Resonances of Metal Nanoantennas on Finite High-Permittivity Dielectric Substrate

et al. 2015

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“…By adjusting the gold plasmonic antennae, a peak graphene absorption rate of 67.54% is obtained in the simulation frequency band. This absorption is enhanced by 30 times compared with that of the floating graphene layer, and 2.2 times with the optimal value of the research by reference [4]. To our knowledge, it is also the highest reported absorption rate achieved inside graphene layer in the concerned spectra.…”

Section: Introductionmentioning

confidence: 57%

“…Meanwhile, over the past few years, a considerable number of graphene-based optoelectronic devices have been demonstrated and studied. One representative device is the graphene-based photodetector [3,4]. However, despite the outstanding properties of graphene including fast carrier mobility and high quantum efficiency, some fundamental limitations still need to be overcome.…”

Section: Introductionmentioning

confidence: 99%

“…With a properly designed plasmonic antenna, the photo-responsivity can be dramatically improved with significant enhancement of optical response, while simultaneously generating a frequency selectivity for the device [4][5][6]. In addition, the optimal operation frequency of the device can be effectively tuned by varying plasmonic antenna's parameters.…”

Section: Introductionmentioning

confidence: 99%

“…However, its performance around the visible spectrum is of great significance in practical engineering designs. The research by J. Zhu et al [4] theoretically explores the performance and discipline of uniformly placed cuboid Au NPs by the FDTD method, and reaches an optimal light absorption of 30.3 %. Here, with the proposed BI-SEM, we further study the absorption enhancement of graphene with boosted plasmonic effects.…”

Section: Introductionmentioning

confidence: 99%

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Enhanced plasmonic light absorption engineering of graphene: simulation by boundary-integral spectral element method

et al. 2015

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Graphene's relatively poor absorption is an essential obstacle for designing graphene-based photonic devices with satisfying photo-responsivity. To enhance the tunable light absorption of graphene, appropriate excitation of localized surface plasmon resonance is considered as a promising approach. In this work, the strategy of incorporating periodic cuboid gold nanoparticle (NP) cluster arrays and cylindrical gold NP arrays with Bragg reflectors into graphene-based photodetectors are theoretically studied by the boundary-integral spectral element method (BI-SEM). With the BI-SEM, the models can be numerically analyzed with excellent accuracy and efficiency. Numerical simulation shows that the proposed structures can effectively engineer the light absorption in graphene by tuning plasmon resonance. In the spectra of 300 nm to 1000 nm, a maximum light absorption of 67.54% is observed for the graphene layer with optimal parameters of the photodetector model.

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Laser‐aided curing of a GnP/epoxy nanocomposite optimised by multiscale finite element analysis

Manta

Soutis

Grésil

2019

Mat Design Process Comm

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In this work, the possibility of laser‐aided curing of graphene nanoplatelet (GnP)/epoxy nanocomposites is explored by means of finite element analysis. A multiscale and multiphysics analysis is performed to identify and optimise critical manufacturing parameters—laser speed and power. The proposed model is parametrically studied, and its results are thoroughly discussed in terms of polymerisation degree and temperature field depth. Finally, the laser scanning of a specimen was conducted, and the polymerisation performance was recorded.

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Manipulating light absorption of graphene using plasmonic nanoparticles

Cited by 80 publications

References 23 publications

Substrate-Mediated Broadband Tunability in Plasmonic Resonances of Metal Nanoantennas on Finite High-Permittivity Dielectric Substrate

Substrate-Mediated Broadband Tunability in Plasmonic Resonances of Metal Nanoantennas on Finite High-Permittivity Dielectric Substrate

Enhanced plasmonic light absorption engineering of graphene: simulation by boundary-integral spectral element method

Laser‐aided curing of a GnP/epoxy nanocomposite optimised by multiscale finite element analysis

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