Dielectric function modelling and sensitivity forecast for Au–Ag alloy nanostructures

2020 ◽  
Vol 22 (26) ◽  
pp. 14932-14940
Author(s):  
Xiu Wang ◽  
Caixia Kan ◽  
Juan Xu ◽  
Xingzhong Zhu ◽  
Mingming Jiang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Dielectric Function ◽  
Theoretical Calculations ◽  
Experimental Results ◽  
Refractive Index Sensitivity ◽  
Dielectric Data ◽  
Function Modelling ◽  
Alloy Nanostructures ◽  
Fdtd Simulations ◽  
Index Sensitivity

Based on theoretical calculations, FDTD simulations and experimental results, the refractive index sensitivity of Au–Ag alloy nanostructures were investigated, indicating the credibility and feasibility of the modelled dielectric data of alloy.

scholarly journals Improved Refractive Index Sensitivity Utilizing Long-Period Gratings with Periodic Corrugations on Cladding

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Anthony Lim ◽  
Wen Bin Ji ◽  
Swee Chuan Tjin
Keyword(s):  
Refractive Index ◽  
Cost Effective ◽  
Experimental Results ◽  
Refractive Index Sensitivity ◽  
Long Period ◽  
Specimen Collection ◽  
Long Period Gratings ◽  
Highly Sensitive ◽  
Index Sensitivity

A new structure of Long-Period Gratings (LPGs) sensor is introduced as a sensitive ambient RI sensor. This structure consists of creating periodic corrugations on the cladding of the LPG. The experimental results show that this LPG structure has good performances in terms of linearity and sensitivity and serves as a highly sensitive and cost-effective sensor. It also has the advantage of portability as the corrugation can also serve as the reservoir for the specimen collection to be tested.

scholarly journals Improve the Hole Size-dependent Refractive Index Sensitivity  of Au-Ag Nanocages by Tuning the Alloy Composition

2021 ◽  
Author(s):  
Jianjun LI ◽  
Qiu-Xiang Qin ◽  
Guo-Jun Weng ◽  
Jian Zhu ◽  
Jun-Wu Zhao
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Electric Field ◽  
Alloy Composition ◽  
Geometric Parameters ◽  
Sensitivity Factor ◽  
Hole Size ◽  
Refractive Index Sensitivity ◽  
Electric Field Direction ◽  
Index Sensitivity

Abstract In this study, the nanoboxes is converted into Au-Ag alloy nanocages by increasing the hole size. Discrete dipole approximation (DDA) is used to study the extinction spectrum and the refractive index sensing characteristics of Au-Ag alloy nanocages with different geometric parameters. With the increase of Au component, the local surface plasmon resonance (LSPR) peak shows approximately linear redshift and the sensitivity factor shows approximately linear decrease. The refractive index sensitivity can be effectively controlled by the Au-Ag ratio at large hole size because the hole and cavity surfaces distribute more environmental dielectric components. Therefore, increasing the hole size and decreasing the Au-Ag ratio can improve the refractive index sensitivity. To explain the effect of alloy composition on the LSPR characteristics and the refractive index sensitivity, the local electric field distributions with different geometric parameters are plotted. We find that the electric field direction on the hole and cavity surfaces are controlled by the Au-Ag ratio and environmental dielectric constant. Moreover, the field vector on the hole and cavity surfaces are formed by the superposition of the incident field, the electric field generated by the oscillating electrons on the outer surface, and the polarized field in the environmental dielectric constant.

Influence of diamond-like carbon overlay properties on refractive index sensitivity of nano-coated optical fibres

2013 ◽  
Vol 210 (10) ◽  
pp. 2100-2105 ◽  
Author(s):  
Mateusz Śmietana ◽  
Mariusz Dudek ◽  
Marcin Koba ◽  
Bartosz Michalak
Keyword(s):  
Refractive Index ◽  
Diamond Like Carbon ◽  
Optical Fibres ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity

Measurements of refractive index sensitivity using long-period grating refractometer

2004 ◽  
Vol 229 (1-6) ◽  
pp. 65-69 ◽  
Author(s):  
Joo Hin Chong ◽  
Ping Shum ◽  
H Haryono ◽  
A Yohana ◽  
M.K Rao ◽  
...  
Keyword(s):  
Refractive Index ◽  
Long Period Grating ◽  
Refractive Index Sensitivity ◽  
Long Period ◽  
Index Sensitivity

Photonic Crystal Fiber Mach-Zehnder Interferometer Based on Refractive Index Sensitivity of Cladding Corrosion Optimization

2019 ◽  
Vol 56 (17) ◽  
pp. 170629
Author(s):  
黄国家 Guojia Huang ◽  
马诗章 Shizhang Ma ◽  
王恋 Lian Wang ◽  
李仕平 Shiping Li ◽  
冯文林 Wenlin Feng
Keyword(s):  
Refractive Index ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Zehnder Interferometer ◽  
Refractive Index Sensitivity ◽  
Crystal Fiber ◽  
Index Sensitivity ◽  
Mach Zehnder Interferometer
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