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2018-05-09 - Article/Dans un journal avec peer-review - Anglais - 4 page(s)

Gonzalez Vila Alvaro , Ioannou Andreas , Loyez Médéric , Debliquy Marc , Lahem Driss , Caucheteur Christophe , "Surface plasmon resonance sensing in gaseous media with optical fiber gratings" in Optics Letters, 43(10), 2308-2311, OL.43.002308

  • Edition : American Institute of Physics, New York (NY)
  • Codes CREF : Optique des fibres (électromagnétisme) (DI1252)
  • Unités de recherche UMONS : Electromagnétisme et Télécommunications (F108)
  • Instituts UMONS : Institut de Recherche en Science et Ingénierie des Matériaux (Matériaux)
  • Centres UMONS : Ingénierie des matériaux (CRIM)

Abstract(s) :

(Anglais) Surface plasmon resonance excitation with optical fiber gratings has been typically studied in aqueous solutions. This work describes the procedure to excite a plasmon wave in gaseous media and perform refractive index measure- ments in these environments. Grating photo-inscription with 193 nm excimer laser radiation allows us to obtain slightly tilted fiber Bragg gratings exhibiting a cladding mode resonance comb along several hundreds of nano- meters. Their refractive index sensitive range extends from gases to liquids, so operation in both media is compared. We demonstrate that the thickness of the metal coating re- quired for surface plasmon excitation in gases is roughly one third of the one usually used for liquids. The developed platforms exhibit a temperature insensitive response of 78 nm/RIU when tested with different gases.