Sensitivity analysis of a label-free detection using Opto-plasmonic nano-structured antenna

This paper reports a design method of optoplasmonics sensor that consider a pair of elliptical gold nano antenna mounted on a quartz substrate. A 2D array of gold nano antenna can be used for a variety of biomedical applications due to its key electronic and optical properties which are shape and si...

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Bibliographic Details
Published in2021 IEEE International Conference on Sensors and Nanotechnology (SENNANO) pp. 93 - 96
Main Authors Verma, Sneha, Ghosh, Souvik, Rahman, B. M. A
Format Conference Proceeding
LanguageEnglish
Published IEEE 22.09.2021
Subjects
FOM
full-width half-maximum
Gold
nano-antenna
Plasmons
Point of care
resonating wavelength
Salinity (geophysical)
sensitivity
Sensitivity analysis
Shape
Water quality
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DOI10.1109/SENNANO51750.2021.9642511

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Summary:This paper reports a design method of optoplasmonics sensor that consider a pair of elliptical gold nano antenna mounted on a quartz substrate. A 2D array of gold nano antenna can be used for a variety of biomedical applications due to its key electronic and optical properties which are shape and size dependent. An elliptical shaped coupled gold nano antenna with 100 nm major axis, a and 10 nm minor axis, b was optimized with separation distance, g and height, h to achieve a high sensitivity with a narrow full-width half-maximum (FWHM) and a good figure of merit (FOM). By exploiting the resonance shift of transmission spectra and high electric field confinements, the sensitivity of the proposed sensor was obtained nearly 526-530 nm/RIU and the FWHM and FOM were calculated around 110 nm and 8.1, respectively. Additionally, the proposed sensing structure have been explored to measure the 2-propanol (IPA) concentration in water.
DOI:10.1109/SENNANO51750.2021.9642511