Graphene-Gold Metasurface Architectures for Ultrasensitive Plasmonic Biosensing

Shuwen Zeng , Kandammathe Valiyaveedu Sreekanth , Jingzhi Shang , Ting Yu (1, 2) , Chih-Kuang Chen , Feng Yin , Dominique Baillargeat (3) , Philippe Coquet (4) , Ho-Pui Ho , Andrei V. Kabashin (5) , Ken-Tye Yong (6)

1 NC State - North Carolina State University [Raleigh]
2 QCRI - Qatar Computing Research Institute [Doha, Qatar]
3 XLIM-SRF - Systèmes RF
4 IEMN - Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520
5 LP3 - Laboratoire Lasers, Plasmas et Procédés photoniques
6 EEE - School of Electrical and Electronic Engineering

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 x 10(-18) Mfor 7.3 kDa 24-mer single-stranded DNA.

Domaines: Optique / photonique

Shuwen Zeng, Kandammathe Valiyaveedu Sreekanth, Jingzhi Shang, Ting Yu, Chih-Kuang Chen, et al.. Graphene-Gold Metasurface Architectures for Ultrasensitive Plasmonic Biosensing. Advanced Materials, 2015, 27 (40), pp.6163-6169. ⟨10.1002/adma.201501754⟩. ⟨hal-01418522⟩