Open AccessSurface plasmon resonance-like integrated sensor at terahertz frequencies for gaseous analytes
Author(s) -
Alireza Hassani,
Maksim Skorobogatiy
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.020206
Subject(s) - materials science , terahertz radiation , analyte , surface plasmon polariton , surface plasmon resonance , optics , surface plasmon , refractive index , plasmon , photonic crystal fiber , optical fiber , optoelectronics , localized surface plasmon , fiber optic sensor , dispersion (optics) , fiber , nanotechnology , wavelength , chemistry , nanoparticle , physics , composite material
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 approximately 30 microm 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 case of a gaseous analyte. We then demonstrate the possibility of designing high sensitivity sensors with amplitude resolution of 3.4 x 10(-4) RIU, and spectral resolution of 1.3 x 10(-4) RIU in THz regime. Finally, novel sensing methodology based on detection of changes in the core mode dispersion is proposed.