Theoretical study of the light scattering from two alternating concentric double silica-gold nanoshell

Khosravi, Heidar; Daneshfar, Nader; Bahari, Ali

doi:10.1063/1.3418374

Cited by 19 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Because the total diameter of the three-layered silver nanocylinder is much smaller than the incident wavelength, the free electrons in the silver cylinder oscillate like a simple dipole, and the quasi-static approach could be used to calculate the optical response including the local electric field at different spatial position and the absorption cross section. 28,29 In order to make the plasmon coupling from the three boundaries in the multilayered cylinder easier to understand, we plotted an energy level diagram describing the coupling process between the inner nanowire and outer nanotube plasmon resonances, 30,31 as shown in Fig. 1(b).…”

mentioning

confidence: 99%

Geometrical parameters controlled focusing and enhancing near field in infinite circular metal-dielectric multilayered cylinder

Gao

2013

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Geometrical parameters controlled focusing and enhancing near field in infinite circular metal-dielectric multilayered cylinder

Gao

2013

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…i The potential distribution in the different regions of the n-layered nanocomposite is obtained by solving the Laplace's equation. Accordingly, the potential j i in each region is given by [29]:…”

Section: Triple Layer Spherical Nanoparticlesmentioning

confidence: 99%

Size dependent local field enhancement factor of CdSe based core@shell spherical nanoparticles

Bergaga

Ali

Debela

2022

Mater. Res. Express

View full text Add to dashboard Cite

We investigated the size dependent local field enhancement factor (LFEF) of CdSe@Ag and CdSe@ZnSe@Ag core/shell spherical nanoparticles theoretically and numerically within the framework of quasi-static approximation. From the potential distributions in the core, shell(s), and host medium, and using the modified Drude-Sommerfeld model, we separately obtained the expressions for LFEF of core/shell and core/spacer/shell nanocomposites. By changing the sizes of each of the components of the nanocomposites in these expressions, we found that the LFEF of CdSe@Ag increased as the size of the core is decreased. At the same time, the resonance peaks are red shifted in the inner interface and blue shifted in the outer interface of the shell. The result also reveals that whether the shell radius is kept constant or decreased, increasing the core size produces a lower field enhancement factor showing that the core size is a crucial parameter to change the field enhancement factor of the dielectric core and metal shell nanoparticle (NP). When the spacer (ZnSe) is placed between the core (CdSe) and the shell (Ag), the resonance peaks increased with increase in the size of the core which was not observed in the case of the two layered core/shell nanocomposites having the same core and shell sizes. We found that placing the spacer and varying the sizes of the core, spacer, and shell show different effects on the LFEF of the nanocomposite. The possibility of obtaining size dependent LFEF by adjusting the sizes of nanoparticles makes these nanocomposites attractive for applications in nonlinear optics, photocatalysis, and optoelectronics.

show abstract

“…In the study of linear optical response of silica-gold double nanoshells, it has been found that decreasing the thickness either of the gold shells or the second dielectric layer leads to red shifts of the |ω − − 〉 mode [20]. Khosravi et al reported the light scattering properties of silica-gold double nanoshells [29]. Two separated scattering peaks have been observed, and the intensity and wavelength of the peaks depend on the thickness of the gold shells and silica layer.…”

Section: Introductionmentioning

confidence: 96%

The Effect of Metal Type on the Separate Dielectric Layer-Dependent Plasmon Coupling in Al–Au Bimetallic Metal-Dielectric-Metal Nanoshells

Zhu

Zhao

2014

Plasmonics

View full text Add to dashboard Cite

Metal type-dependent plasmonic absorption properties of Al-Au bimetallic metal-dielectric-metal nanoshells have been investigated theoretically by using the quasi-static theory of classical electrodynamics. It has been found that the three-layered nanoshells present different surface plasmon resonance (SPR) properties when the metal type of the inner core and outer shell is exchanged. For Al-dielectric-Au nanoshell, the |ω − − 〉 band takes the major role of the absorption spectrum. Whereas for Au-dielectric-Al nanoshell, the |ω − + 〉 mode has the highest intensity. The corresponding physical origin has been attributed to the different optical parameters of Au and Al, which results in different local field enhancement and plasmon energy at each plasmon hybridization mode. The plasmonic absorption properties also depend on the thickness of the separate layer and are further affected by the metal type of the inner core and outer shell. For Al-dielectric-Au nanoshell, the increasing separate layer thickness results in distinct red shift of |ω − + 〉 peak but slight blue shift of the |ω + − 〉 peak. For Au-dielectric-Al nanoshell, the |ω + − 〉 and |ω − + 〉 modes fade down and blue shifts, whereas the major peak corresponding to the |ω − − 〉 mode blue shifts and gets intense firstly and then red shifts and decreases as the thickness is increased. These results indicate that different plasmon hybridization modes of the multilayered nanoshell could be enhanced selectively by choosing different type of metal as the outer shell.

show abstract

Theoretical study of the light scattering from two alternating concentric double silica-gold nanoshell

Cited by 19 publications

References 17 publications

Geometrical parameters controlled focusing and enhancing near field in infinite circular metal-dielectric multilayered cylinder

Geometrical parameters controlled focusing and enhancing near field in infinite circular metal-dielectric multilayered cylinder

Size dependent local field enhancement factor of CdSe based core@shell spherical nanoparticles

The Effect of Metal Type on the Separate Dielectric Layer-Dependent Plasmon Coupling in Al–Au Bimetallic Metal-Dielectric-Metal Nanoshells

Contact Info

Product

Resources

About