Open AccessTapered optical fiber sensor based on localized surface plasmon resonance
Author(s) -
Hsing Ying Lin,
Chen Huang,
Gia Ling Cheng,
Nan Kuang Chen,
HsiangChen Chui
Publication year - 2012
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.20.021693
Subject(s) - surface plasmon resonance , materials science , refractive index , fiber optic sensor , optics , optical fiber , surface plasmon , absorption (acoustics) , localized surface plasmon , biosensor , fiber , plasmon , refractometry , optoelectronics , analyte , nanoparticle , nanotechnology , chemistry , physics , composite material
A tapered fiber localized surface plasmon resonance (LSPR) sensor is demonstrated for refractive index sensing and label-free biochemical detection. The sensing strategy relies on the interrogation of the transmission intensity change due to the evanescent field absorption of immobilized gold nanoparticles on the tapered fiber surface. The refractive index resolution based on the interrogation of transmission intensity change is calculated to be 3.2×10⁻⁵ RIU. The feasibility of DNP-functionalized tapered fiber LSPR sensor in monitoring anti-DNP antibody with different concentrations spiked in buffer is examined. Results suggest that the compact sensor can perform qualitative and quantitative biochemical detection in real-time and thus has potential to be used in biomolecular sensing applications.