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Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR

A strong light coupling between core-guided mode and metal layer leads to the enhancement of plasmonic sensor performance significantly. In this work, a plasmonic metal coated micro-channel based surface plasmon resonance sensor is proposed where a micro-channel is introduced to increase the mode co...

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Main Authors: Haider, Firoz, Aoni, Rifat Ahmmed, Ahmed, Rajib, Chew, Wei Jen, Mahdiraji, Ghafour Amouzad
Format: Article
Published: Elsevier 2021
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://eprints.um.edu.my/28028/
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spelling my.um.eprints.280282022-07-18T04:44:34Z http://eprints.um.edu.my/28028/ Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR Haider, Firoz Aoni, Rifat Ahmmed Ahmed, Rajib Chew, Wei Jen Mahdiraji, Ghafour Amouzad TA Engineering (General). Civil engineering (General) A strong light coupling between core-guided mode and metal layer leads to the enhancement of plasmonic sensor performance significantly. In this work, a plasmonic metal coated micro-channel based surface plasmon resonance sensor is proposed where a micro-channel is introduced to increase the mode coupling by reducing the distance between the core and analyte channel. Gold (Au) is considered to coat the micro-channel and generate surface plasmon on the fiber surface. Titanium dioxide (TiO2) is employed to stick the Au layer tightly with the silica which assists in shifting the sensing wavelength from visible to mid-IR region. The light-guiding and biosensing properties of the proposed D-shaped sensor performance is numerically investigated by employing the finite element method. The sensor obtained maximal wavelength and amplitude sensitivities of 1,21,000 nm/ Refractive index unit (RIU) and 1,405 RIU-1, respectively in the x-polarized mode. Moreover, the sensor exhibits an extremely high resolution of 8.26 ? 10- 7 RIU and the limit of detection (LOD) is 6.83 ? 10-12 RIU2/nm, respectively, in the wavelength interrogation technique. To the best of our knowledge, the proposed sensor shows the highest wavelength sensitivity, resolution and LOD when compared to the existing PCF based SPR sensors. Due to the extremely sensitive response, the proposed sensor will enhance the unknown analyte detection capability significantly. Furthermore, the broad sensing range of analyte refractive index (RI) variation from 1.33 to 1.44 makes the sensor suitable for biochemical as well as medical diagnostic applications. Elsevier 2021-08 Article PeerReviewed Haider, Firoz and Aoni, Rifat Ahmmed and Ahmed, Rajib and Chew, Wei Jen and Mahdiraji, Ghafour Amouzad (2021) Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR. Optics & Laser Technology, 140. ISSN 0030-3992, DOI https://doi.org/10.1016/j.optlastec.2021.107020 <https://doi.org/10.1016/j.optlastec.2021.107020>. 10.1016/j.optlastec.2021.107020
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Haider, Firoz
Aoni, Rifat Ahmmed
Ahmed, Rajib
Chew, Wei Jen
Mahdiraji, Ghafour Amouzad
Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR
description A strong light coupling between core-guided mode and metal layer leads to the enhancement of plasmonic sensor performance significantly. In this work, a plasmonic metal coated micro-channel based surface plasmon resonance sensor is proposed where a micro-channel is introduced to increase the mode coupling by reducing the distance between the core and analyte channel. Gold (Au) is considered to coat the micro-channel and generate surface plasmon on the fiber surface. Titanium dioxide (TiO2) is employed to stick the Au layer tightly with the silica which assists in shifting the sensing wavelength from visible to mid-IR region. The light-guiding and biosensing properties of the proposed D-shaped sensor performance is numerically investigated by employing the finite element method. The sensor obtained maximal wavelength and amplitude sensitivities of 1,21,000 nm/ Refractive index unit (RIU) and 1,405 RIU-1, respectively in the x-polarized mode. Moreover, the sensor exhibits an extremely high resolution of 8.26 ? 10- 7 RIU and the limit of detection (LOD) is 6.83 ? 10-12 RIU2/nm, respectively, in the wavelength interrogation technique. To the best of our knowledge, the proposed sensor shows the highest wavelength sensitivity, resolution and LOD when compared to the existing PCF based SPR sensors. Due to the extremely sensitive response, the proposed sensor will enhance the unknown analyte detection capability significantly. Furthermore, the broad sensing range of analyte refractive index (RI) variation from 1.33 to 1.44 makes the sensor suitable for biochemical as well as medical diagnostic applications.
format Article
author Haider, Firoz
Aoni, Rifat Ahmmed
Ahmed, Rajib
Chew, Wei Jen
Mahdiraji, Ghafour Amouzad
author_facet Haider, Firoz
Aoni, Rifat Ahmmed
Ahmed, Rajib
Chew, Wei Jen
Mahdiraji, Ghafour Amouzad
author_sort Haider, Firoz
title Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR
title_short Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR
title_full Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR
title_fullStr Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR
title_full_unstemmed Plasmonic micro-channel based highly sensitive biosensor in visible to mid-IR
title_sort plasmonic micro-channel based highly sensitive biosensor in visible to mid-ir
publisher Elsevier
publishDate 2021
url http://eprints.um.edu.my/28028/
_version_ 1739828427148492800
score 13.211869

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