Polarization state-based refractive index sensing with plasmonic nanostructures

Nanoscale ◽  
2015 ◽  
Vol 7 (47) ◽  
pp. 20171-20179 ◽  
Author(s):  
Shao-Ding Liu ◽  
Xin Qi ◽  
Wu-Chao Zhai ◽  
Zhi-Hui Chen ◽  
Wen-Jie Wang ◽  
...  
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Polarization State ◽  
Plasmonic Nanostructures ◽  
Refractive Index Sensing

A theoretical value of figure of merit exceeding 1700 is achieved with a polarization state-based refractive index sensing approach.

scholarly journals Analysis of Effects of Surface Roughness on Sensing Performance of Surface Plasmon Resonance Detection for Refractive Index Sensing Application

Sensors ◽  
2021 ◽  
Vol 21 (18) ◽  
pp. 6164
Author(s):  
Treesukon Treebupachatsakul ◽  
Siratchakrit Shinnakerdchoke ◽  
Suejit Pechprasarn
Keyword(s):  
Surface Roughness ◽  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Figure Of Merit ◽  
Root Mean Square Roughness ◽  
Performance Parameters ◽  
Refractive Index Sensing ◽  
Sensing Performance

This paper provides a theoretical framework to analyze and quantify roughness effects on sensing performance parameters of surface plasmon resonance measurements. Rigorous coupled-wave analysis and the Monte Carlo method were applied to compute plasmonic reflectance spectra for different surface roughness profiles. The rough surfaces were generated using the low pass frequency filtering method. Different coating and surface treatments and their reported root-mean-square roughness in the literature were extracted and investigated in this study to calculate the refractive index sensing performance parameters, including sensitivity, full width at half maximum, plasmonic dip intensity, plasmonic dip position, and figure of merit. Here, we propose a figure-of-merit equation considering optical intensity contrast and signal-to-noise ratio. The proposed figure-of-merit equation could predict a similar refractive index sensing performance compared to experimental results reported in the literature. The surface roughness height strongly affected all the performance parameters, resulting in a degraded figure of merit for surface plasmon resonance measurement.

scholarly journals Nanoslotted microring resonator for high figure of merit refractive index sensing

2020 ◽  
Vol 50 (1) ◽  
Author(s):  
Daquan Yang ◽  
Bing Duan ◽  
Xuan Zhang ◽  
Hui Lu
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Fdtd Method ◽  
Three Dimensional ◽  
Microring Resonator ◽  
Strong Light ◽  
Refractive Index Sensing ◽  
Biochemical Sensing ◽  
Light Matter Interaction ◽  
High Figure

A nanoslotted microring resonator (NSMR) with enhanced light-matter interaction has been designed, which can be used for high sensitive refractive index sensing. The performance of the device is investigated theoretically based on a three-dimensional finite-difference time-domain (3D-FDTD) method. In order to achieve high figure of merit sensing, the nanoslot geometry is exploited to make the optical field strongly localized inside the low index region and overlap sufficiently with the analytes. By using the 3D-FDTD method, the proposed NSMR sensor device achieves a high Q-factor (Q > 105) and sensitivity ~100 nm/RIU (RIU – refractive index unit). Moreover, the strong light confinement introduced by the nanoslot in NSMR results in the sensor figure of merit as high as 6.73 × 103. Thus, the design we proposed is a promising platform for refractive index-based biochemical sensing and lab-on-a-chip applications.

scholarly journals Refractive index sensing with Fano resonances in silicon oligomers

2017 ◽  
Vol 375 (2090) ◽  
pp. 20160070 ◽  
Author(s):  
Katie E. Chong ◽  
Henry W. Orton ◽  
Isabelle Staude ◽  
Manuel Decker ◽  
Andrey E. Miroshnichenko ◽  
...  
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Spectral Features ◽  
Fano Resonances ◽  
Refractive Index Sensitivity ◽  
New Horizons ◽  
Refractive Index Sensing ◽  
Index Sensitivity

We demonstrate experimentally refractive index sensing with localized Fano resonances in silicon oligomers, consisting of six disks surrounding a central one of slightly different diameter. Owing to the low absorption and narrow Fano-resonant spectral features appearing as a result of the interference of the modes of the outer and the central disks, we demonstrate refractive index sensitivity of more than 150 nm RIU −1 with a figure of merit of 3.8. This article is part of the themed issue ‘New horizons for nanophotonics’.

Fano Resonances in Thin Metallic Grating for Refractive Index Sensing with High Figure of Merit

Plasmonics ◽  
2015 ◽  
Vol 11 (1) ◽  
pp. 139-149 ◽  
Author(s):  
Lixia Li ◽  
Yuzhang Liang ◽  
Mengdi Lu ◽  
Wei Peng
Keyword(s):  
Refractive Index ◽  
Figure Of Merit ◽  
Fano Resonances ◽  
Metallic Grating ◽  
Refractive Index Sensing ◽  
High Figure
Sign in / Sign up

Export Citation Format

Share Document