Universiti Teknologi Malaysia Institutional Repository

Optimization of a dual-slot waveguide for a refractive index biosensor

Sahu, Sourabh and Ali, Jalil and Singh, Ghanshyam (2018) Optimization of a dual-slot waveguide for a refractive index biosensor. Optica Applicata, 48 (1). pp. 161-167. ISSN 0078-5466

[img]
Preview
PDF
664kB

Official URL: http://dx.doi.org/10.5277/oa180115

Abstract

The present article illustrates the modeling and optimization of a dual-slot waveguide for the application of a refractive index biosensor. The nanometer scale waveguide structure uses the silicon-on-insulator platform for the consideration of higher sensitivity and compactness of a resonator biosensor. The modal analysis is performed using the finite difference method based on full vector eigenmode calculation. The maximum field penetration in the lower index region is found for the quasi-TE mode. The sensitivity is maximized through the optimization of the waveguide dimension by relating effective refractive index with the dispersion of a waveguide. The biosensor showed the maximum calculated sensitivity of 461.327 nm/RIU and a limit-of-detection of 2.601 × 10–6 RIU (where RIU denotes refractive index unit).

Item Type:Article
Uncontrolled Keywords:biosensor, evanescent field, eigenmode, dispersion
Subjects:Q Science > Q Science (General)
Divisions:Science
ID Code:97104
Deposited By: Yanti Mohd Shah
Deposited On:13 Sep 2022 07:41
Last Modified:13 Sep 2022 07:41

Repository Staff Only: item control page