Abstract
Highly localized refractive index modulations are photo-written in the core of pure silica fiber using point-by-point focused UV femtosecond pulses. These specific gratings exhibit a comb-like transmitted amplitude spectrum, with polarization-dependent narrowband cladding mode resonances. In this work, eccentric gratings are surrounded by a gold sheath, allowing the excitation of surface plasmon polaritons (SPP) for radially-polarized light modes. The spectral response is studied as a function of the surrounding refractive index and a maximum sensitivity of (refractive index unit) is reported for a well-defined cladding-mode resonance among the spectral comb. This novel kind of plasmonic fiber grating sensor offers rapidity of production, design flexibility, and high temperature stability.
© 2014 Optical Society of America
Full Article | PDF ArticleMore Like This
Mohamad Diaa Baiad and Raman Kashyap
Opt. Lett. 40(1) 115-118 (2015)
Mohamad Diaa Baiad, Mathieu Gagné, Wendy-Julie Madore, Etienne De Montigny, Nicolas Godbout, Caroline Boudoux, and Raman Kashyap
Opt. Lett. 38(22) 4911-4914 (2013)
Hicham Chikh-Bled, Karima Chah, Álvaro González-Vila, Boumediène Lasri, and Christophe Caucheteur
Opt. Lett. 41(17) 4048-4051 (2016)