A fiber-optic chemical sensor based on surface plasmon resonance

Enzyme detection by surface plasmon resonance using specially engineered spacers and plasmonic labelling

“…This is of comparable magnitude to the first SPR fibre sensor reported in the literature by Jorgensen & Yee (2.5×10 -4 -7.5×10 -5 RIU) [15] . Unsurprisingly, there was no improvement of the sensitivity observed depending on the characterisation of the SPR signal (collection mode vs. transmission reported by Jorgensen et al [15] ) since sensitivity primarily depends on the dielectric function of the silver and the optical fibre characteristics. The Full Width at Half Max (FWHM) of the SPR peak varies between 45nm for the lower range of refractive index tested to about 80nm for the highest refractive index range.…”

“…While most commercial and experimental SPR sensors rely on either the measurement of the reflectivity of a metallic coating deposited on a dielectric [1,2,3] or spectral characterisation of light transmission through an optical fibre [14,15] , this new form of sensor exploits the re-emitted light from the plasmonic wave that occurs due to surface scattering [16,17] . As shown in the Figure 1, a broadband light source is coupled into the fibre while the light re-emitted by the plasmonic coating is collected using optical fibres located within the sensing regions by an "evanescent light collection apparatus".…”

Surface plasmon-resonance sensor for express analyses

“…За последние годы количество работ, посвященных эффекту поверхностного плазмонного резонанса (ППР), неуклонно растет, это свидетельствует о том, что исследова-ния ППР представляют большой интерес как с общефизической точки зрения, так и для раз-личных практических применений. Сенсоры ППР широко применяются в биологии [1,2] и химии [3,4] из-за их простоты, высокой чувствительности, минимального потребления реа-гентов и возможности работать в реальном времени. Технологии ППР непрерывно развивают-ся.…”

Surface Plasmon Resonance Spectroscopy-Based Process Sensors

“…Different configurations have been employed with the goal of miniaturization and significant effort has been made towards the development of compact SPR systems and probe geometries that enable the collection of research or bench top quality SPR spectra from fiber optic-based sensors. Several fiber optic-based sensors have been developed for liquid phase bio-assay, most notably the multi-mode fiber based SPR probe marketed by Pharmacia 4,5 . A single-mode optical fiber SPR sensor system was described by Slavík, et al for application in liquid systems 6 .…”