Alphabetic-core assisted microstructure fiber based plasmonic biosensor
Document Type
Article
Publication Date
12-1-2020
Abstract
Light control capability of photonic crystal fiber (PCF) is a unique feature which can be applied to improve biosensing and plasmonic performance. Here, we reported alphabetic-core microstructure fiber-based plasmonic biosensor. Three different alphabetic R-, M-, and S-shaped cores of PCF-based plasmonic microstructures show controllable light propagation to enhance biosensor sensitivity and resolution. The light-guiding properties and sensing performance are investigated numerically using the finite element method (FEM). The proposed R-shaped core (RSC), M-shaped core (MSC), and S-shaped core (SSC) PCF-based plasmonic sensors show the maximum wavelength and amplitude sensitivities of 12,000, 11,000, 10,000 nm/RIU and 478, 533, and 933 RIU-1, respectively, in the refractive index (RI) range of 1.33 to 1.40. The sensors also exhibit promising wavelength resolution of 8.33 x 10(-6), 9.09 x 10(-6), and 1.0 x 10(-6)RIU, with figure of merit (FOM) of 108, 143, and 217 RIU(-1)for RSC, MSC, and SSC PCFs, respectively. The tunable sensing performance is also observed in design structures due to controllable light traveling path and their interaction with analytes. The proposed alphabetic-core PCF SPR sensors would be a promising candidate for the application of light controlling, trapping in microscale environment, and biosensing.
Keywords
Propagation control, Photonic crystal fiber, Surface plasmon resonance, Optical sensors
Divisions
universiti
Publication Title
Plasmonics
Volume
15
Issue
6
Publisher
Springer Verlag (Germany)
Publisher Location
ONE NEW YORK PLAZA, SUITE 4600, NEW YORK, NY, UNITED STATES