Surface plasmon resonance-like integrated sensor at terahertz frequencies for gaseous analytes

Alireza Hassani, Maksim Skorobogatiy
2008 Optics Express  
Plasmon-like excitation at the interface between fully polymeric fiber sensor and gaseous analyte is demonstrated theoretically in terahertz regime. Such plasmonic excitation occurs on top of a ∼ 30μm ferroelectric PVDF layer wrapped around a subwavelength porous polymer fiber. In a view of designing a fiber-based sensor of analyte refractive index, phase matching of a plasmon-like mode with the fundamental core guided mode of a low loss porous fiber is then demonstrated for the challenging
more » ... of a gaseous analyte. We then demonstrate the possibility of designing high sensitivity sensors with amplitude resolution of 3.4 · 10 −4 RIU, and spectral resolution of 1.3 · 10 −4 RIU in THz regime. Finally, novel sensing methodology based on detection of changes in the core mode dispersion is proposed.
doi:10.1364/oe.16.020206 pmid:19065159 fatcat:4smwjy6lnnha5do6hd3leigu7e