Surface plasmon effects excitation from three-pair arrays of silver-shell nanocylinders

Chau, Yuan-Fong Chou; Yeh, Han-Hsuan; Tsai, Din Ping

doi:10.1063/1.3068469

Cited by 52 publications

(23 citation statements)

References 27 publications

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“…COMSOL Multiphysics is a numerical simulation package that is based on FEM, and has been employed by several research groups for the characterization of nanoshell plasmonics confined to 2D [19][20][21] and 3D space [22]. The lack of 3D simulations in the literature may be attributed to COMSOL's computationally intensive nature.…”

Section: Introductionmentioning

confidence: 99%

Investigating the plasmonics of a dipole-excited silver nanoshell: Mie theory versus finite element method

Khoury¹,

Norton²,

Vo‐Dinh³

2010

Nanotechnology

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This report compares COMSOL's finite element method (FEM) algorithm with the Mie theory for solving the electromagnetic fields in the vicinity of a silica-silver core-shell nanoparticle when excited by a radiating dipole. The novelty of this investigation lies in the excitation source of the nanoshell system: an oscillating electric dipole is frequently used as a model for both molecular scattering and molecular fluorescence; moreover, a common classical model of atomic or molecular spontaneous emission is a decaying electric dipole. The radiated power spectra were evaluated both analytically and numerically by integrating the Poynting vector around 20, 60 and 100 nm nanoshells, thereby solving the total and scattered fields generated by a dipole positioned inside the core and in the surrounding air medium, respectively. The agreement was excellent in amplitude, plasmon resonance peak position and full width at half-maximum. The FEM algorithm also generates accurate solutions of the near-field electromagnetics in the spatial domain, where the E-field behavior as a function of polar angle theta for a fixed observation radius was evaluated. The quasistatic approximation, which is valid for small nanoparticles, is also employed to assess its limitations relative to the Mie and FEM algorithms.

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Section: Introductionmentioning

confidence: 99%

Investigating the plasmonics of a dipole-excited silver nanoshell: Mie theory versus finite element method

Khoury¹,

Norton²,

Vo‐Dinh³

2010

Nanotechnology

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show abstract

“…In Figure 8, the structural parameters, h, P x , P y , d, and t, are 1000, 1030, 470, 270, and 30 nm, respectively. It is obvious that the intensity distribution of |E| and |H| at resonance wavelength is highly trapped among the gap region (i.e., gap plasmon resonance [77]) and the edge surface (i.e., edge enhancement [78]), which are induced by constructive interference, and this effect could enhance the absorptance [79]. The |E| distribution shows an enhanced distribution profile both on the top and side surfaces, while the |H| distribution appears on the side surface.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application

et al. 2019

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In this paper, a periodic metallic–dielectric nanorod array which consists of Si nanorods coated with 30 nm Ag thin film set in a hexagonal configuration is fabricated and characterized. The fabrication procedure is performed by using nanosphere lithography with reactive ion etching, followed by Ag thin-film deposition. The mechanism of the surface and gap plasmon modes supported by the fabricated structure is numerically demonstrated by the three-dimensional finite element method. The measured and simulated absorptance spectra are observed to have a same trend and a qualitative fit. Our fabricated plasmonic sensor shows an average sensitivity of 340.0 nm/RIU when applied to a refractive index sensor ranging from 1.0 to 1.6. The proposed substrates provide a practical plasmonic nanorod-based sensing platform, and the fabrication methods used are technically effective and low-cost.

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“…Surface plasmon polaritons (SPPs) can use as electromagnetic (EM) wave transportation and confine EM wave at the dielectric–metal interface because of their capacities of handling light in the nanoscale [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 ]. A standard dielectric (or insulator) waveguide cannot form the EM wave beyond conventional optics’ diffraction limit [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

et al. 2020

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A plasmonic metal-insulator-metal waveguide filter consisting of one rectangular cavity and three silver baffles is numerically investigated using the finite element method and theoretically described by the cavity resonance mode theory. The proposed structure shows a simple shape with a small number of structural parameters that can function as a plasmonic sensor with a filter property, high sensitivity and figure of merit, and wide bandgap. Simulation results demonstrate that a cavity with three silver baffles could significantly affect the resonance condition and remarkably enhance the sensor performance compared to its counterpart without baffles. The calculated sensitivity (S) and figure of merit (FOM) in the first mode can reach 3300.00 nm/RIU and 170.00 RIU−1. Besides, S and FOM values can simultaneously get above 2000.00 nm/RIU and 110.00 RIU−1 in the first and second modes by varying a broad range of the structural parameters, which are not attainable in the reported literature. The proposed structure can realize multiple modes operating in a wide wavelength range, which may have potential applications in the on-chip plasmonic sensor, filter, and other optical integrated circuits.

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Surface plasmon effects excitation from three-pair arrays of silver-shell nanocylinders

Cited by 52 publications

References 27 publications

Investigating the plasmonics of a dipole-excited silver nanoshell: Mie theory versus finite element method

Investigating the plasmonics of a dipole-excited silver nanoshell: Mie theory versus finite element method

Fabrication and Characterization of a Metallic–Dielectric Nanorod Array by Nanosphere Lithography for Plasmonic Sensing Application

Ultrawide Bandgap and High Sensitivity of a Plasmonic Metal-Insulator-Metal Waveguide Filter with Cavity and Baffles

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