Tunable local surface plasmon resonance and refractive index sensitivity ability of three-layered dielectric-silver bimetallic nanoshells

2019 ◽  
Vol 439 ◽  
pp. 66-75
Author(s):  
Zhao-Wang Wu ◽  
Ye-Wan Ma ◽  
Li-Hua Zhang ◽  
Xun-Chang Yin ◽  
Ming-Fang Yi
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Local Surface ◽  
Refractive Index Sensitivity ◽  
Local Surface Plasmon Resonance ◽  
Index Sensitivity ◽  
Layered Dielectric

Analysis of Local Surface Plasmon Resonance in Multilayered Au/Ag/Graphene Nanoshells

NANO ◽  
2017 ◽  
Vol 12 (05) ◽  
pp. 1750062 ◽  
Author(s):  
Chao Liu ◽  
Zhaoting Liu ◽  
Jingwei Lv ◽  
Tao Sun ◽  
Qiang Liu ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Graphene Layer ◽  
Surrounding Medium ◽  
Dipole Approximation ◽  
Localized Surface Plasmon ◽  
Local Surface ◽  
Local Surface Plasmon Resonance

The localized surface plasmon resonance (LSPR) properties of Au/Ag/graphene nanoshells are studied by discrete dipole approximation (DDA). The coupled resonance wavelengths show a remarkable dependence on the graphene thickness as well as refractive index of the surrounding medium. The resonance wavelengths of Au/Ag/graphene nanoshells red-shift as the thickness of the graphene layer is increased, when the radii of the Au core and Ag interlayer are 40[Formula: see text]nm and 45[Formula: see text]nm, respectively. Specifically, the longer wavelength red-shifts from 540[Formula: see text]nm to 740[Formula: see text]nm when the refractive index varies from 1.25 to 2.05.

Effects of Grating Slant Angle on Surface Plasmon Resonance and its Applications for Sensors

2014 ◽  
Vol 536-537 ◽  
pp. 342-345 ◽  
Author(s):  
Xue Hui Xiong ◽  
La Min Zhan ◽  
Xuan Ke
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Momentum Conservation ◽  
Refractive Index Sensitivity ◽  
Coupling Condition ◽  
Optical Wave ◽  
Slant Angle ◽  
Index Sensitivity

In this study, we emphasized on effects of grating slant angle of tilted dielectric gratings (TG) on surface plasmon resonance (SPR). The momentum conservation for an optical wave exciting an SPR via TG is different from unslant gratings. The coupling condition induces the period along the grating surface (in the direction x) be decided not only by grating period but also by slant angle. The results calculated by rigorous coupled-wave analysis theory (RCWA) indicate that the resonant wavelength and the refractive index sensitivity are strongly dependent on the period in the direction x (noted Λx). And the refractive index sensitivity increases with the rise of the period Λx. The SPR sensor through TG offers high sensitivity about 800nm per refractive index unit and narrow full-width at half maximum (FWHM) about 5nm when monitoring biochemical liquid solutions.

Low-cost replication of plasmonic gold nanomushroom arrays for transmission-mode and multichannel biosensing

RSC Advances ◽  
2015 ◽  
Vol 5 (75) ◽  
pp. 61270-61276 ◽  
Author(s):  
Wanbo Li ◽  
Jiancai Xue ◽  
Xueqin Jiang ◽  
Zhangkai Zhou ◽  
Kangning Ren ◽  
...  
Keyword(s):  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Low Cost ◽  
Transmission Mode ◽  
Normal Surface ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity ◽  
Surface Plasmon Resonance Sensors

A low-cost, facile approach was developed for replication of plasmonic gold nanomushroom arrays, which performed in transmission mode and showed excellent refractive index sensitivity comparable to that of normal surface plasmon resonance sensors.

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