Tunable near-infrared optical properties of three-layered gold–silica–gold nanoparticles

Wu, Da‐Jian; Liu, X. J.

doi:10.1007/s00340-009-3432-0

Cited by 48 publications

(63 citation statements)

References 26 publications

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“…8a-b. It should be noted that when ε 2 =4 and ε 4 =2, the w À À mode blue shifts firstly and then red shifts when r 2 is decreased, which is similar to the report of Wu et al [11], as shown in Fig. 8c.…”

Section: The Local Electric Field Pattern In Gold-dielectric-gold Nansupporting

confidence: 85%

“…4 Local field distribution in the incident plane of gold-dielectric-gold multilayer nanoshells at different SPR modes: a w þ À mode and the resonance wavelength is 578 nm; b w À À mode and the resonance wavelength is 880 nm. [r 1 , r 2 , r 3 ]= [15,20,25]nm and ε 2 =ε 4 =2 to the w À À mode red shift, which is similar to the reports of Wu et al [11]. However, the shifting of w þ À mode as a function of r 1 has different feature when the local environment is changed.…”

Section: The Local Electric Field Pattern In Gold-dielectric-gold Nansupporting

confidence: 82%

“…Wu et al found increasing of the core radius leads to the w À À mode red shift distinctly but the w þ À mode blue shift. What's more, it is surprising that with increasing middle layer thickness, the w À À mode shifts nonmonotonously [11]. In the report of Hu et al, the spectral tunability of multilayer nanoshells has also been explained and characterized by plasmon hybridization [12].…”

Section: Introductionmentioning

confidence: 91%

“…Therefore, most of the previous reports are focused in the interaction between the lowerenergy bonding shell plasmon mode and the sphere plasmon, which results in two hybridized SPR modes. The lower-energy mode w À À corresponds to an anti-symmetric coupling, whereas the higher-energy mode w þ À corresponds to a symmetric coupling [11]. Wu et al found increasing of the core radius leads to the w À À mode red shift distinctly but the w þ À mode blue shift.…”

Section: Introductionmentioning

confidence: 97%

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Tuning the Dipolar Plasmon Hybridization of Multishell Metal-Dielectric Nanostructure: Gold Nanosphere in a Gold Nanoshell

Zhu

Zhao

2011

Plasmonics

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Because of the interaction between dipole resonances of the inner gold sphere and the outer gold shell, gold-dielectric-gold multishells with sub-50 nm diameter may at most have three hybridization modes of surface plasmon resonance (SPR). Theoretical calculations based on quasi-static theory indicate that there are blending and splitting of SPR bands in the absorption spectra, which makes the number of absorption peak tunable by changing the radius of inserted gold sphere, thickness of gold shell, dielectric constant of middle dielectric shell or outer environment. The two absorption peaks at longer wavelength, which correspond to the hybridization from the bonding shell plasmon and the sphere plasmon, are usually intense and well tunable. The absorption peak at shorter wavelength, which corresponds to the symmetric coupling between the anti-bonding shell plasmon and the sphere plasmon, is relative weak and only occurs with large dielectric constant of the middle shell, small dielectric constant of the outer surrounding, large inner radius of the gold shell, and small radius of the inner gold sphere. Furthermore, the physical origin of these plasmon hybridizations in gold-dielectric-gold multishells nanostructure has also been illuminated by analyzing the local electric field distributions.

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Section: The Local Electric Field Pattern In Gold-dielectric-gold Nansupporting

confidence: 85%

Section: The Local Electric Field Pattern In Gold-dielectric-gold Nansupporting

confidence: 82%

Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Tuning the Dipolar Plasmon Hybridization of Multishell Metal-Dielectric Nanostructure: Gold Nanosphere in a Gold Nanoshell

Zhu

Zhao

2011

Plasmonics

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“…The plasmon resonances of Au nanoshells depend dramatically on the geometric parameters and local dielectric environment. Recently, the Au-silica-Au multilayer nanoshells have been fabricated and widely studied [5][6][7][8][9][10][11][12][13][14][15][16][17]. Compared with Au nanoshell, the Au-silica-Au nanoshells can provide more abundant and tunable plasmon resonances because of the interaction between the plasmon resonance mode of the inner Au sphere and the outer Au shell, as explained by plasmon hybridization theory [18].…”

Section: Introductionmentioning

confidence: 99%

Dual Symmetry Breaking in Gold-Silica-Gold Multilayer Nanoshells

et al. 2014

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In this study, the optical properties induced by dual symmetry breaking including both shell cutting and core offsetting in the gold-silica-gold multilayer nanoshells have been studied by the discrete dipole approximation simulations and the plasmon hybridization theory. The influences of the incident polarization and geometrical parameters on the plasmon resonances of these dual-symmetry-breaking Au-silicaAu multilayer nanoshells (DSMNS) are investigated. Under the combined effect of the two types of symmetry breaking, it is found that the polarization-dependent multiple plasmon resonances can be induced in the DSMNS. By changing the polarization of 90 o , the switching of the two transparency windows can be flexibly adjusted in the DSMNS with different types of Au core offsetting. This polarization-controlled transparency is likely to generate a wide range of photonic applications such as filters and color displays. Furthermore, the local refractive index sensitivity of the DSMNS is also investigated, and the triple extinction peaks simultaneous shift is found as the surrounding medium changed, which suggests the potential applications for biological sensors.

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Chirality Transfer from Sub‐Nanometer Biochemical Molecules to Sub‐Micrometer Plasmonic Metastructures: Physiochemical Mechanisms, Biosensing, and Bioimaging Opportunities

et al. 2020

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Tunable near-infrared optical properties of three-layered gold–silica–gold nanoparticles

Cited by 48 publications

References 26 publications

Tuning the Dipolar Plasmon Hybridization of Multishell Metal-Dielectric Nanostructure: Gold Nanosphere in a Gold Nanoshell

Tuning the Dipolar Plasmon Hybridization of Multishell Metal-Dielectric Nanostructure: Gold Nanosphere in a Gold Nanoshell

Dual Symmetry Breaking in Gold-Silica-Gold Multilayer Nanoshells

Chirality Transfer from Sub‐Nanometer Biochemical Molecules to Sub‐Micrometer Plasmonic Metastructures: Physiochemical Mechanisms, Biosensing, and Bioimaging Opportunities

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