Evaluation of Nanoplasmonic Optical Fiber Sensors Based on D-Type and Suspended Core Fibers with Metallic Nanowires

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Santos, D (Author) Other; Guerreiro, A (Author) FCUP; Baptista, JM (Author) Other

Journal

Title: Photonics

Vol. 33

Final page: 100

Publisher: MDPI

Indexing

ISI Web of Knowledge - 5 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00R-2ER

DOI: 10.3390/photonics6030100

Abstract (EN): The introduction of metallic nanostructures in optical fibers has revolutionized the field of plasmonic sensors since they produce sharper and fine-tuned resonances resulting in higher sensitivities and resolutions. This article evaluates the performance of three different plasmonic optical fiber sensors based on D-type and suspended core fibers with metallic nanowires. It addresses how their different materials, geometry of the components, and their relative position can influence the coupling between the localized plasmonic modes and the guided optical mode. It also evaluates how that affects the spatial distributions of optical power of the different modes and consequently their overlap and coupling, which ultimately impacts the sensor performance. In this work, we use numerical simulations based on finite element methods to validate the importance of tailoring the features of the guided optical mode to promote an enhanced coupling with the localized modes. The results in terms of sensitivity and resolution demonstrate the advantages of using suspended core fibers with metallic nanowires.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8