Comparison of novel graded refractive index tapered nanowell design against a triangle array commonly used for surface enhanced raman scattering

2012 ◽  
Author(s):  
Zachary A. Sechrist ◽  
Lee R. Cambrea ◽  
Ronald J. Tonucci
Keyword(s):  
Refractive Index ◽  
Raman Scattering ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering

scholarly journals Surface Enhanced Raman Scattering on Silver sinusoidal nano-grating: Impact of Interactions of grating-coupled Surface Plasmon polaritons

2021 ◽  
Author(s):  
Zhaoyi Chen ◽  
Ke Feng ◽  
Zhibin Chen ◽  
Jinxing Shen ◽  
Huanliang Li
Keyword(s):  
Refractive Index ◽  
Raman Scattering ◽  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Surface Enhanced Raman Scattering ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Enhanced Raman Scattering ◽  
The Impact ◽  
Plasmon Polaritons

Abstract In this study, we reported a silver sinusoidal nanograting used in microchannels, forming H2O/Ag/NOA heterostructure, and studied the impact of interactions of grating-coupled surface Plasmon polaritons (SPPs) on Surface-enhanced Raman Scattering (SERS). FDTD simulations showed that when the refractive index of NOA is close to that of H2O, there were two modes of odd coupling and even coupling between SPPs. Additionally, the thinner the Ag grating, the stronger the coupling, accompanied by the frequency shift of the two coupling modes. We also estimated the influence of refractive index of the surrounding medium on SPPs coupling by varying the dielectric of the upper and lower layer of Ag grating. Our experimental results were supported by FDTD calculations, which confirmed the importance of the interactions of grating-coupled SPPs in the design of SERS substrate.

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