Field enhancement and target localization impact on the biosensitivity of nanostructured plasmonic sensors

Maha Chamtouri 1 Mitradeep Sarkar 1 Julien Moreau 1 Mondher Besbes 1 Hassen Ghalila 2 Michael Canva 1
1 Laboratoire Charles Fabry / Biophotonique
LCF - Laboratoire Charles Fabry
2 LSAMA - Laboratoire de Spectroscopie Atomique, Moléculaire et Applications
Abstract : Surface plasmon resonance (SPR) biosensors using field enhancement in nanograting surfaces can overcome sensitivity limitations of conventional SPR biosensors. Nevertheless, the correlation of the local field enhancement established in such structures with sensitivity enhancement has not been extensively studied. We present a numerical study of the coupling effect between the various plasmon modes present in nanograting structures with various structural parameters. We give here a quantitative demonstration of the improvement in sensing performance of SPR biosensors by selective localization of the target molecules in the regions where the electromagnetic field intensity is locally enhanced.
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Submitted on : Friday, November 27, 2015 - 2:52:18 PM
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Maha Chamtouri, Mitradeep Sarkar, Julien Moreau, Mondher Besbes, Hassen Ghalila, et al.. Field enhancement and target localization impact on the biosensitivity of nanostructured plasmonic sensors. Journal of the Optical Society of America B, Optical Society of America, 2014, 31 (5), pp.1223-1231. ⟨10.1364/JOSAB.31.001223⟩. ⟨hal-01230307⟩

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