Abstract

We propose a novel bio-sensing platform based on the observation of the shift of theleaky surface plasmon mode that occurs at the edge of the plasmonic band gap of metal gratingsbased on two-dimensional gold nano-patch arrays when an analyte is deposited on the top of themetallic structure. We detail the numerical analysis, the fabrication and the characterization of thesetwo-dimensional arrangements of gold patches in linear regime showing that sensitivity of ourdevice approaches a value of 1000 nm/RIU with a corresponding Figure of Merit (FOM) of 222RIU-1. We provide experimental proof of the sensing capabilities of the device by observing colourvariations in the diffracted field when the air overlayer is replaced with a small quantity of IsopropylAlcohol (IPA). Effects of technological tolerance such as rounded corners and surface imperfectionsare also discussed. We also report proof of changes in colour intensities as a function of theair/filling ratio ad periodicity and discuss how they can be obtained by diffracted spectra. Finally wereport the numerical and experimental investigation of the non-linear behaviour of the devicehighlighting the Surface Enhanced Raman Scattering (SERS) performance.

Autore Pugliese

• Bianco Giuseppe Valerio , Marrocco Valeria

Tutti gli autori

• M. Grande; M.A. Vincenti; T. Stomeo; G.V. Bianco; D. de Ceglia; G. Morea; R. Marani; V. Marrocco; V. Petruzzelli; M. de Vittorio; G. Bruno; M. Scalora; A. d'Orazio

Titolo volume/Rivista

Advances in science and technology

Anno di pubblicazione

2013

ISSN

1662-0356

ISBN

Non Disponibile

Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile

Numero di citazioni Scopus

Non Disponibile

Ultimo Aggiornamento Citazioni

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Settori ERC

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Codici ASJC

Non Disponibile