Localized surface plasmon resonance and refractive index sensitivity of vacuum-evaporated nanostructured gold thin films

2015 ◽  
Vol 90 (1) ◽  
pp. 107-116 ◽  
Author(s):  
V. N. Rai ◽  
A. K. Srivastava ◽  
C. Mukherjee ◽  
S. K. Deb
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Localized Surface Plasmon Resonance ◽  
Localized Surface Plasmon ◽  
Refractive Index Sensitivity ◽  
Nanostructured Gold ◽  
Index Sensitivity

scholarly journals Optical Micro/Nanofiber-Based Localized Surface Plasmon Resonance Biosensors: Fiber Diameter Dependence

Sensors ◽  
2018 ◽  
Vol 18 (10) ◽  
pp. 3295 ◽  
Author(s):  
Kaiwei Li ◽  
Wenchao Zhou ◽  
Shuwen Zeng
Keyword(s):  
Surface Plasmon Resonance ◽  
Surface Plasmon ◽  
Plasmon Resonance ◽  
Performance Optimization ◽  
Localized Surface Plasmon Resonance ◽  
Fiber Diameter ◽  
Localized Surface Plasmon ◽  
Refractive Index Sensitivity ◽  
Sensing Applications ◽  
Index Sensitivity

Integration of functional nanomaterials with optical micro/nanofibers (OMNFs) can bring about novel optical properties and provide a versatile platform for various sensing applications. OMNFs as the key element, however, have seldom been investigated. Here, we focus on the optimization of fiber diameter by taking micro/nanofiber-based localized surface plasmon resonance sensors as a model. We systematically study the dependence of fiber diameter on the sensing performance of such sensors. Both theoretical and experimental results show that, by reducing fiber diameter, the refractive index sensitivity can be significantly increased. Then, we demonstrate the biosensing capability of the optimized sensor for streptavidin detection and achieve a detection limit of 1 pg/mL. Furthermore, the proposed theoretical model is applicable to other nanomaterials and OMNF-based sensing schemes for performance optimization.

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