Article (Scientific journals)
Plasmonic sensors based on tilted Bragg gratings in multicore optical fibers
Ortega-Gomez, Angel; Loyez, Médéric; Lobry, Maxime et al.
2021In Optics Express, 29 (12), p. 18469-18480
Peer reviewed
 

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Abstract :
[en] Bareandgold-coatedtiltedfiberBragggratings(TFBGs)cannowadaysbeconsidered as a mature technology for volume and surface refractometric sensing, respectively. As for other technologies, a continuous effort is made towards the production of even more sensitive sensors, thereby enabling a high-resolution screening of the surroundings and the possible detection of rare events. To this aim, we study in this work the development of TFBG refractometers in 4-core fibers. In particular, we show that the refractometric sensitivity of the cut-off mode can reach 100 nm/RIU for a bare grating. Using another demodulation method, a tenfold sensitivity increase is obtained when tracking the extremum of the SPR (surface plasmon resonance) envelope for a gold-coated TFBG configuration. Immobilization of DNA probes was performed as a proof-of-concept to assess the high surface sensitivity of the device.
Disciplines :
Biochemistry, biophysics & molecular biology
Physics
Author, co-author :
Ortega-Gomez, Angel
Loyez, Médéric  ;  Université de Mons > Faculté des Sciences > Service de Protéomie et Microbiologie
Lobry, Maxime ;  Université de Mons > Recherche > Service ERC Unit - Advanced Photonic
Chah, Karima ;  Université de Mons > Recherche > Service ERC Unit - Advanced Photonic
Zubi, Joseba
Villatoro, Joel
Caucheteur, Christophe ;  Université de Mons > Faculté Polytechnique > Service d'Electromagnétisme et Télécommunications
Language :
English
Title :
Plasmonic sensors based on tilted Bragg gratings in multicore optical fibers
Publication date :
07 June 2021
Journal title :
Optics Express
Publisher :
Optical Society of America, United States - District of Columbia
Volume :
29
Issue :
12
Pages :
18469-18480
Peer reviewed :
Peer reviewed
Research unit :
S828 - Protéomie et Microbiologie
F108 - Electromagnétisme et Télécommunications
Research institute :
R100 - Institut des Biosciences
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