FDTD numerical analysis of SPR sensing using graphene-based photonic crystal

Tarumaraja, Kalaivani A.; Menon, P. Susthitha; Said, Fairus Atida; Jamil, Nor Aini; Ehsan, Abang Annuar; Shaari, Sahbudin; Majlis, Burhanuddin Yeop; Jalar, Azman

doi:10.1109/smelec.2016.7573595

Cited by 11 publications

(1 citation statement)

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“…Tatasusunan ini terdiri daripada prisma, kaca bersalut lapisan emas dan sampel luar. Cahaya magnet melintang (TM) akan menyebabkan gelombang SPP teruja pada prisma bersalut dengan bahan-bahan plasmon (Mukhtar et al 2014;Tarumaraja et al 2016). Pengujaan SPP terhasil daripada ayunan menegak yang dialami oleh elektron pada antara muka dielektrik-logam.…”

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Peningkatan Kepekaan Biosensor Urea Berasaskan Resonans Plasmon Permukaan dan Tatasusunan Kretschmann dengan Struktur Hibrid Grafin-MoS2

Jamil

Menon

Gan

et al. 2018

JSM

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The present paper analyses a surface plasmon resonance (SPR) biosensor based on graphene that leads to improvement on the efficiency of an urea biosensor due to high adsorption. Kretschmann configuration is well known as the most effectively used technique for plasmon excitation. In this work, we investigated the effect of MoS 2 with a fine layer of graphene deposited on a plasmonic material, gold (Au), into the configuration. Simulation is based on finite-difference time domain (FDTD) method for analysis. The performance of SPR biosensor can be monitored by analyzing the sensitivity and full width-at-half-maximum (FWHM) of the SPR spectrum. The measurements are observed at 670 and 785 nm for urea detection. The molarity and refractive index is varied from 1.335 to 1.342 for the sensing layer. The results showed that the percentage increase in sensitivity for the proposed biosensor Au/MoS 2 /graphene over conventional biosensor Au is 98% and 202% at 670 and 785 nm, respectively, which indicates that the proposed novel SPR biosensor is better suited for urea detection.

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