We report on the design, fabrication, and characterization of optical sensors based on Bloch surface waves propagating at the truncation edge of one-dimensional photonic crystals. The sensors can be simultaneously operated in both a label-free mode, where small refractive index changes at the surface are detected, and a fluorescence mode, where the fluorescence from a novel heptamethyne dye label in the proximity of the surface is collected. The two modes operate in the near-infrared spectral range with the same configuration of the optical reading apparatus. The limit of detection is shown to be smaller than that of equivalent surface plasmon sensors and the fluorescence collection efficiency is such that it can be efficiently analyzed by the same camera sensor used for label-free operation. (C) 2014 Optical Society of America

Combining label-free and fluorescence operation of Bloch surface wave optical sensors / Sinibaldi, Alberto; Antonio, Fieramosca; Riccardo, Rizzo; Anopchenko, Oleksiy; Aleksei, Anopchenko; Norbert, Danz; Peter, Munzert; Claudio, Magistris; Claudia, Barolo; Michelotti, Francesco. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 39:10(2014), pp. 2947-2950. [10.1364/ol.39.002947]

Combining label-free and fluorescence operation of Bloch surface wave optical sensors

SINIBALDI, ALBERTO;ANOPCHENKO, OLEKSIY;MICHELOTTI, Francesco
2014

Abstract

We report on the design, fabrication, and characterization of optical sensors based on Bloch surface waves propagating at the truncation edge of one-dimensional photonic crystals. The sensors can be simultaneously operated in both a label-free mode, where small refractive index changes at the surface are detected, and a fluorescence mode, where the fluorescence from a novel heptamethyne dye label in the proximity of the surface is collected. The two modes operate in the near-infrared spectral range with the same configuration of the optical reading apparatus. The limit of detection is shown to be smaller than that of equivalent surface plasmon sensors and the fluorescence collection efficiency is such that it can be efficiently analyzed by the same camera sensor used for label-free operation. (C) 2014 Optical Society of America
photonic crystal-surface enhanced-fluorescence stratified media performance biosensors optics; biosensing; bloch surface waves; photonic crystals
01 Pubblicazione su rivista::01a Articolo in rivista
Combining label-free and fluorescence operation of Bloch surface wave optical sensors / Sinibaldi, Alberto; Antonio, Fieramosca; Riccardo, Rizzo; Anopchenko, Oleksiy; Aleksei, Anopchenko; Norbert, Danz; Peter, Munzert; Claudio, Magistris; Claudia, Barolo; Michelotti, Francesco. - In: OPTICS LETTERS. - ISSN 0146-9592. - STAMPA. - 39:10(2014), pp. 2947-2950. [10.1364/ol.39.002947]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/625984
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