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Graphene-Gold Metasurface Architectures for Ultrasensitive Plasmonic Biosensing
Shuwen Zeng1,2, Kandammathe Valiyaveedu Sreekanth3, Jingzhi Shang3
1CINTRA CNRS/NTU/THALES, UMI 3288, Research Techno Plaza, 50 Nanyang Drive, Border X Block, Singapore, 637553, Singapore.
Abstract:
Graphene-gold metasurface architectures that can provide significant gains in plasmonic detection sensitivity for trace-amount target analytes are reported. Benefiting from extreme phase singularities of reflected light induced by strong plasmon-mediated energy confinements, the metasurface demonstrates a much-improved sensitivity to molecular bindings nearby and achieves an ultralow detection limit of 1 × 10(-18) m for 7.3 kDa 24-mer single-stranded DNA.
