Universiti Teknologi Malaysia Institutional Repository

Refractive index biosensor using sidewall gratings in dual-slot waveguide

Sahu, S. and Ali, J. and Singh, G. (2017) Refractive index biosensor using sidewall gratings in dual-slot waveguide. Optics Communications, 402 . pp. 408-412. ISSN 0030-4018

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Abstract

This paper presents an optical biosensor using sidewall grating in dual slot waveguide, modeled on silicon-on-insulator (SOI) platform. By optimizing the geometric parameters of the device, the spectral response is tailored to obtain a sharp resonant peak with high transmissivity that also enhances the limit-of-detection. The device detects the shift in resonant wavelength on a variation of the biomaterial refractive index. The simulation study has performed using the transfer matrix method. The obtained characteristics of the sensors include linear response to a change in refractive index of biomaterial, limit of detection of the order of 10−6 and ease of fabrication. The device performance has also compared with other SOI resonator structures like photonic crystal waveguide, sub-wavelength grating, ring resonator and grating resonator.

Item Type:Article
Uncontrolled Keywords:Biosensor, Bragg grating, Transfer matrix method
Subjects:Q Science > Q Science (General)
Divisions:Science
ID Code:77000
Deposited By: Fazli Masari
Deposited On:30 Apr 2018 14:32
Last Modified:30 Apr 2018 14:32

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