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Wavelength shift in a whispering gallery microdisk due to bacterial sensing: a theoretical approach

Hala Ghali, Pablo Bianucci and Yves-Alain Peter

Article (2017)

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Terms of Use: Creative Commons Attribution Non-commercial No Derivatives .
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Cite this document: Ghali, H., Bianucci, P. & Peter, Y.-A. (2017). Wavelength shift in a whispering gallery microdisk due to bacterial sensing: a theoretical approach. Sensing and Bio-Sensing Research, 13, p. 9-16. doi:10.1016/j.sbsr.2017.01.004
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Whispering gallery mode microcavities have recently been studied as a means to achieve real-time label-free detection of biological targets such as virus particles, specific DNA sequences, or proteins. Binding of a biomolecule to the surface of a microresonator will increase its path length, leading to a shift in the resonance frequency according to the reactive sensing principle. In this paper, we develop a theoretical expression that will link the reactive shift to the bacteria and microdisk parameters and help quantify the number of bacteria that bind to the surface of a 200μm-diameter silica microdisk.

Uncontrolled Keywords

Optical microdisk; Wavelength shift; Bacterial sensing

Open Access document in PolyPublie
Subjects: 1900 Génie biomédical > 1901 Technologie biomédicale
5200 Microbiologie > 5200 Microbiologie
9000 Sciences de la santé > 9000 Sciences de la santé
Department: Département de génie physique
Research Center: Non applicable
Funders: CRSNG/NSERC, CMC microsystems
Grant number: Strategic Grant 365207-2008, 812, 837, 2976
Date Deposited: 03 Apr 2020 10:04
Last Modified: 08 Apr 2021 10:43
PolyPublie URL: https://publications.polymtl.ca/3589/
Document issued by the official publisher
Journal Title: Sensing and Bio-Sensing Research (vol. 13)
Publisher: Elsevier
Official URL: https://doi.org/10.1016/j.sbsr.2017.01.004


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