(Gold triangular nanoplate core)@(silver shell) nanostructures as highly sensitive and selective plasmonic nanoprobes for hydrogen sulfide detection

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20250-20257 ◽  
Author(s):  
Hua Mi ◽  
Shengyan Wang ◽  
Hang Yin ◽  
Le Wang ◽  
Lin Mei ◽  
...  
Keyword(s):  
Refractive Index ◽  
Hydrogen Sulfide ◽  
High Refractive Index ◽  
Great Sensitivity ◽  
Refractive Index Sensitivity ◽  
Shell Nanostructures ◽  
Highly Sensitive ◽  
Index Sensitivity ◽  
Silver Shell

AuTNP@Ag nanostructures are developed as nanoprobes for hydrogen sulfide. Owing to the high refractive index sensitivity of Au TNPs and facile sulfurization of silver, AuTNP@Ag nanostructures exhibit great sensitivity to both sulfur ions and H2S gas.

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 Miniature highly-birefringent microfiber loop with extremely-high refractive index sensitivity

2012 ◽  
Vol 20 (9) ◽  
pp. 10180 ◽  
Author(s):  
Lipeng Sun ◽  
Jie Li ◽  
Yanzhen Tan ◽  
Xiang Shen ◽  
Xiaodong Xie ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity

Cladding mode reorganization in high-refractive-index-coated long-period gratings: effects on the refractive-index sensitivity

2005 ◽  
Vol 30 (19) ◽  
pp. 2536 ◽  
Author(s):  
Andrea Cusano ◽  
Agostino Iadicicco ◽  
Pierluigi Pilla ◽  
Luigi Contessa ◽  
Stefania Campopiano ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Long Period ◽  
Long Period Gratings ◽  
Cladding Mode ◽  
Index Sensitivity

Characterisation of a Gold Nanorod Sol–Gel Utilising Inter-particle Coupling to Yield High Refractive Index Sensitivity

Plasmonics ◽  
2011 ◽  
Vol 7 (2) ◽  
pp. 331-339
Author(s):  
Philip J. R. Roche ◽  
Maurice Cha-Kiu Cheung ◽  
Sandrine Filion-Côté ◽  
Jonathan Milette ◽  
Timothy Gonzalez ◽  
...  
Keyword(s):  
Refractive Index ◽  
Sol Gel ◽  
High Refractive Index ◽  
Gold Nanorod ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity

A four-band and polarization-independent BDS-based tunable absorber with high refractive index sensitivity

2021 ◽  
Author(s):  
Xianglong Wu ◽  
Ying Zheng ◽  
Yao Luo ◽  
Jianguo Zhang ◽  
Zao Yi ◽  
...  
Keyword(s):  
Refractive Index ◽  
Narrow Band ◽  
Layer Structure ◽  
High Refractive Index ◽  
Perfect Absorber ◽  
Refractive Index Sensitivity ◽  
Tunable Absorber ◽  
Index Sensitivity ◽  
Polarization Independent

A four-band terahertz tunable narrow-band perfect absorber based on Bulk Dirac semi-metallic (BDS) metamaterial with microstructure is designed. The three-layer structure of this absorber from top to bottom is the...

Fully suspended slot waveguides for high refractive index sensitivity

2017 ◽  
Vol 42 (7) ◽  
pp. 1245 ◽  
Author(s):  
Wen Zhou ◽  
Zhenzhou Cheng ◽  
Xinru Wu ◽  
Bingqing Zhu ◽  
Xiankai Sun ◽  
...  
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Index Sensitivity ◽  
Slot Waveguides

Engineering high refractive index sensitivity through the internal and external composition of bimetallic nanocrystals

Nanoscale ◽  
2016 ◽  
Vol 8 (38) ◽  
pp. 16841-16845 ◽  
Author(s):  
Alison F. Smith ◽  
Samantha M. Harvey ◽  
Sara E. Skrabalak ◽  
Rebecca G. Weiner
Keyword(s):  
Refractive Index ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Bimetallic Nanocrystals ◽  
Index Sensitivity

scholarly journals Mode-Splitting for Refractive Index Sensing in Fluorescent Whispering Gallery Mode Microspheres with Broken Symmetry

Sensors ◽  
2018 ◽  
Vol 18 (9) ◽  
pp. 2987 ◽  
Author(s):  
Yvonne Kang ◽  
Alexandre François ◽  
Nicolas Riesen ◽  
Tanya Monro
Keyword(s):  
Refractive Index ◽  
Whispering Gallery Mode ◽  
High Refractive Index ◽  
Refractive Index Sensitivity ◽  
Whispering Gallery ◽  
Mode Splitting ◽  
Surrounding Environment ◽  
Novel Approach ◽  
Surrounding Refractive Index ◽  
Index Sensitivity

Whispering gallery mode (WGM) resonators have become increasingly diverse in terms of both architecture and applications, especially as refractometric sensors, allowing for unprecedented levels of sensitivity. However, like every refractometric sensor, a single WGM resonator cannot distinguish temperature variations from changes in the refractive index of the surrounding environment. Here, we investigate how breaking the symmetry of an otherwise perfect fluorescent microsphere, by covering half of the resonator with a high-refractive-index (RI) glue, might enable discrimination of changes in temperature from variations in the surrounding refractive index. This novel approach takes advantage of the difference of optical pathway experienced by WGMs circulating in different equatorial planes of a single microsphere resonator, which induces mode-splitting. We investigated the influence of the surrounding RI of the microsphere on mode-splitting through an evaluation of the sphere’s WGM spectrum and quality factor (Q-factor). Our results reveal that the magnitude of the mode-splitting increases as the refractive index contrast between the high-refractive-index (RI) glue and the surrounding environment increases, and that when they are equal no mode-splitting can be seen. Investigating the refractive index sensitivity of the individual sub modes resulting from the mode-splitting unveils a new methodology for RI sensing, and enables discrimination between surrounding refractive index changes and temperature changes, although it comes at the cost of an overall reduced refractive index sensitivity.

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