Three-Dimensional Analysis of Scattering Field Interactions and Surface Plasmon Resonance in Coupled Silver Nanospheres

Chen, Luyang; Chau, Yuan-Fong Chou; Tsai, Din Ping

doi:10.1007/s11468-008-9069-8

Cited by 51 publications

(22 citation statements)

References 31 publications

(48 reference statements)

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“…It denotes that touching silver spheres could get “hot spots” only when the wave polarization direction is parallel to the intersphere axis compared with other polarization directions. The numerical simulations are agree well with EI-Sayed groups in experiments, DDA (Discrete-dipole Approximation) and FEM (Finite Element Method) simulations [42, 47, 48]. The optical properties were previously found in experiment by Nakano [49].…”

Section: Numerical Simulation: Results and Analysissupporting

confidence: 85%

Theoretical Analysis the Optical Properties of Multi-coupled Silver Nanoshell Particles

Zhou

Zhang

et al. 2011

Plasmonics

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The surface plasmon resonances of silver nanoshell particles are studied by Green’s function. The nanoshell system of plasmon resonances results from the coupling of the inner and outer shell surface plasmon. The shift of the nanoshell plasmon resonances wavelength is plotted against with different dielectric environments, several different dielectric cores, the ratio of the inner and outer radius, and also its assemblies. The results show that a red- and blue-shifted localized surface plasmon can be tuned over an extended wavelength range by varying dielectric environments, the dielectric constants and the radius of nanoshell core respectively. In addition, the separation distances, the distribution of electrical field intensity, the incident directions and its polarizations are also investigated. The study is useful to broaden the application scopes of Raman spectroscopy and nano-optics.

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Section: Numerical Simulation: Results and Analysissupporting

confidence: 85%

Theoretical Analysis the Optical Properties of Multi-coupled Silver Nanoshell Particles

Zhou

Zhang

et al. 2011

Plasmonics

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“…For the thinner t of 9 nm, the hybrid SPR and CPR modes show larger spectral tunabilitiy than that of the thicker one, t = 10 nm. This can be explained in the same way as it is for core-shell nanospheres 43 . For the bonding mode (mode 4), the bonding-like mode (mode 3) and the anti-bonding mode (modes 1–2) with respect to the corresponding transmittance dip, remarkable red-shifts are observed when t is reduced and ε in PNSs is increased (Fig.…”

Section: Resultsmentioning

confidence: 80%

Simultaneous realization of high sensing sensitivity and tunability in plasmonic nanostructures arrays

Chau

Wang

Shen

et al. 2017

Sci Rep

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A plasmonic nanostructure (PNS) which integrates metallic and dielectric media within a single structure has been shown to exhibit specific plasmonic properties which are considered useful in refractive index (RI) sensor applications. In this paper, the simultaneous realization of sensitivity and tunability of the optical properties of PNSs consisting of alternative Ag and dielectric of nanosphere/nanorod array have been proposed and compared by using three-dimensional finite element method. The proposed system can support plasmonic hybrid modes and the localized surface plasmonic resonances and cavity plasmonic resonances within the individual PNS can be excited by the incident light. The proposed PNSs can be operated as RI sensor with a sensitivity of 500 nm/RIU (RIU = refractive index unit) ranging from UV to the near-infrared. In addition, a narrow bandwidth and nearly zero transmittance along with a high absorptance can be achieved by a denser PNSs configuration in the unit cell of PNS arrays. We have demonstrated the number of modes sustained in the PNS system, as well as, the near-field distribution can be tailored by the dielectric media in PNSs.

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“…The LSP occurring at the largest excitation wavelength is known as the dipole LSP [42,43], while resonances at shorter wavelengths are higher-order LSPs. It has been shown that the dipole resonance redshifts or blueshifts for decreasing distance between the metal nanoparticles for parallel or perpendicular polarization (with respect to the dimer axis) of the incoming field, respectively [44]. For parallel polarization, it has been suggested that the relative shift of the resonance wavelength for the dimer depends exponentially on the gap distance between the particles.…”

Section: Example Calculations: Plasmonic Dimermentioning

confidence: 99%

Three-dimensional integral equation approach to light scattering, extinction cross sections, local density of states, and quasi-normal modes

2013

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We present a numerical formalism for solving the Lippmann-Schwinger equation for the electric field in three dimensions. The formalism may be applied to scatterers of different shapes and embedded in different background media, and we develop it in detail for the specific case of spherical scatterers in a homogeneous background medium. In addition, we show how several physically important quantities may readily be calculated with the formalism. These quantities include the extinction cross section, the total Green's tensor, the projected local density of states, and the Purcell factor as well as the quasi-normal modes of leaky resonators with the associated resonance frequencies and quality factors. We demonstrate the calculations for the well-known plasmonic dimer consisting of two silver nanoparticles and thus illustrate the versatility of the formalism for use in modeling of advanced nanophotonic devices.

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Three-Dimensional Analysis of Scattering Field Interactions and Surface Plasmon Resonance in Coupled Silver Nanospheres

Cited by 51 publications

References 31 publications

Theoretical Analysis the Optical Properties of Multi-coupled Silver Nanoshell Particles

Theoretical Analysis the Optical Properties of Multi-coupled Silver Nanoshell Particles

Simultaneous realization of high sensing sensitivity and tunability in plasmonic nanostructures arrays

Three-dimensional integral equation approach to light scattering, extinction cross sections, local density of states, and quasi-normal modes

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