Electric field enhancement in surface plasmon resonance bimetallic configuration based on chalcogenide prism

2013 ◽  
Vol 114 (1) ◽  
pp. 014304 ◽  
Author(s):  
Pradeep Kumar Maharana ◽  
Sriram Bharadwaj ◽  
Rajan Jha
Keyword(s):  
Surface Plasmon Resonance ◽  
Electric Field ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Field Enhancement ◽  
Electric Field Enhancement

scholarly journals Surface Plasmon Resonance in Periodic Hexagonal Lattice Arrays of Silver Nanodisks

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Jinlian Hu ◽  
Cong Wang ◽  
Shikuan Yang ◽  
Fei Zhou ◽  
Zhigang Li ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Electric Field ◽  
Data Storage ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Strong Dependence ◽  
Hexagonal Lattice ◽  
Field Enhancement ◽  
Electric Field Enhancement ◽  
Range Interaction

The surface plasmon resonance (SPR) of periodic hexagonal lattice arrays of silver nano-disks positioned on glass slides is studied using finite-difference time domain (FDTD) simulations. We investigate numerically the influence of diameter of nano-disks and the gap between nano-disks on SPR transmission spectra and electric field enhancement. We find a strong dependence of resonance wavelength on diameter of the nanodisks. With increasing the gap, electric field enhancement factor could significantly increase and reach a maximum value, which indicates that a special long-range interaction plays an important role. This study is useful for optical modulation applied in near or far field optics, sensing and data storage, and solar cell.

scholarly journals Numerical Study on the Surface Plasmon Resonance Tunability of Spherical and Non-Spherical Core-Shell Dimer Nanostructures

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1728
Author(s):  
Joshua Fernandes ◽  
Sangmo Kang
Keyword(s):  
Refractive Index ◽  
Optical Properties ◽  
Surface Plasmon Resonance ◽  
Aspect Ratio ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Shell Thickness ◽  
Numerical Study ◽  
Field Enhancement ◽  
Core Shell

The near-field enhancement and localized surface plasmon resonance (LSPR) on the core-shell noble metal nanostructure surfaces are widely studied for various biomedical applications. However, the study of the optical properties of new plasmonic non-spherical nanostructures is less explored. This numerical study quantifies the optical properties of spherical and non-spherical (prolate and oblate) dimer nanostructures by introducing finite element modelling in COMSOL Multiphysics. The surface plasmon resonance peaks of gold nanostructures should be understood and controlled for use in biological applications such as photothermal therapy and drug delivery. In this study, we find that non-spherical prolate and oblate gold dimers give excellent tunability in a wide range of biological windows. The electromagnetic field enhancement and surface plasmon resonance peak can be tuned by varying the aspect ratio of non-spherical nanostructures, the refractive index of the surrounding medium, shell thickness, and the distance of separation between nanostructures. The absorption spectra exhibit considerably greater dependency on the aspect ratio and refractive index than the shell thickness and separation distance. These results may be essential for applying the spherical and non-spherical nanostructures to various absorption-based applications.

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