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Design and analysis of all optical biochemical sensors based on the coupled-ring reflectors

Sahar Feili (Shahid Bahonar University of Kerman, Kerman, Iran)
H.R. Sabouhi (Department of Electrical Engineering, Hormoz Branch, Islamic Azad University, Hormoz Island, Iran)
Hassan Sobhani (Shahid Bahonar University of Kerman, Kerman, Iran)
M. Traz (Shahid Bahonar University of Kerman, Kerman, Iran)

Sensor Review

ISSN: 0260-2288

Article publication date: 24 September 2019

Issue publication date: 5 November 2019

77

Abstract

Purpose

This study aims to propose a new scheme for designing a high-sensitivity optical biosensor. For this, two agents have been considered: reflection-type micro-resonators, which filter the noise of the pump, and coupled-ring reflectors (CRRs), which are coupled to partial reflecting elements in the bus waveguide to create Fano-resonance. These two agents improve the sensor sensitivity and have low-power optical switching/modulation.

Design/methodology/approach

The proposed model is based on the coupling of the CRRs with the Fabry–Pérot cavity. The slope of the Fano-resonance line shape and consequently the sensitivity of the proposed CRRs are higher than those of conventional microring resonators.

Findings

The proposed scheme has many characteristics: CRRs have been used to create a higher slope of the Fano-resonance line shape; the sensitivity of the sensor shows improvement on the basis of reflection-type micro-resonators and by the removal of the pump noise; the designed sensor has low-power optical switching/modulation; and the modeling and designing of a novel high-sensitivity resonator is based on coupling the CRRs with the Fabry–Pérot cavity.

Originality/value

This study has proposed a new scheme for designing a high-sensitivity optical biosensor. This method is based on the improvement of the sensitivity by two agents: reflection-type micro-resonators, which filter the noise of the pump, and coupled-ring reflectors, which are coupled to partial reflecting elements in the bus waveguide to create Fano-resonance.

Keywords

Citation

Feili, S., Sabouhi, H.R., Sobhani, H. and Traz, M. (2019), "Design and analysis of all optical biochemical sensors based on the coupled-ring reflectors", Sensor Review, Vol. 39 No. 6, pp. 857-861. https://doi.org/10.1108/SR-01-2018-0014

Publisher

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Emerald Publishing Limited

Copyright © 2019, Emerald Publishing Limited

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