Surface label-free sensing by means of a fluorescent multilayered photonic structure

A fluorescent dielectric multilayer is exploited for label-free sensing in aqueous microenvironment. Fluorescence is laser-excited and collected through prism-coupling to a surface electromagnetic mode, also known as Bloch surface waves (BSW) localized at the interface between the multilayer and the outer aqueous medium. By detecting the spectral changes of the BSW-coupled light emission due to an external perturbation of the refractive index (Dn), a sensitivity of 2500 nm/RIU and a limit of detection down to Dn=3 10^-6 are obtained.

Surface label-free sensing by means of a fluorescent multilayered photonic structure / Descrovi E.; Frascella F.; Ballarini M.; Moi V.; Lamberti A.; Michelotti F.; Giorgis F.; Pirri C. F.. - In: APPLIED PHYSICS LETTERS. - ISSN 0003-6951. - 101(2012), p. 131105.

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Titolo: Surface label-free sensing by means of a fluorescent multilayered photonic structure
Autori: 
DESCROVI, EMILIANO
FRASCELLA, FRANCESCA
MOI, VALERIA
LAMBERTI, ANDREA
GIORGIS, FABRIZIO
PIRRI, Candido
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Data di pubblicazione: 2012
Rivista: 
APPLIED PHYSICS LETTERS  
Digital Object Identifier (DOI): http://dx.doi.org/10.1063/1.4754615
Appare nelle tipologie:1.1 Articolo in rivista

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http://hdl.handle.net/11583/2502541

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