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Analysis of surface plasmon resonance based bimetal coated tapered fiber optic sensor with enhanced sensitivity through radially polarized light
- Source :
- Optics Communications. 379:6-12
- Publication Year :
- 2016
- Publisher :
- Elsevier BV, 2016.
-
Abstract
- The presented proposal of surface plasmon resonance (SPR) configuration with tapered fiber structure and radially polarized light beam is a new and different analysis towards the sensitivity enhancement in the field of SPR based fiber optic sensors. Here the taper waist region of optical fiber having diameter around 330 μm is deposited with 40 nm thin Ag layer, 10 nm thin Au layer and the sensing layer with refractive index 1.333–1.353 respectively for achieving the bimetal coated taper fiber optic sensor with SPR configuration. The cylindrical symmetry and special radial field distribution of radially polarized light make its more interesting SPR study and leads to the enhanced excitation of surface plasmon wave. This results 10 times better sensitivity of fiber optic sensor output response as compared to p-polarized light beam with wavelength interrogation technique and 2.307 times better sensitivity with intensity interrogation technique. Also including the temperature effect in proposed taper bimetallic structure, this sensitivity analysis provides an evidence, for exploring a new idea towards the enhanced excitation of SPR which expedites the new avenues in the field of sensor applications with radially polarized light.
- Subjects :
- Optical fiber
Materials science
Physics::Optics
Polarization-maintaining optical fiber
02 engineering and technology
01 natural sciences
Graded-index fiber
Bimetal
law.invention
010309 optics
Optics
law
0103 physical sciences
Light beam
Electrical and Electronic Engineering
Physical and Theoretical Chemistry
Surface plasmon resonance
business.industry
021001 nanoscience & nanotechnology
Atomic and Molecular Physics, and Optics
Electronic, Optical and Magnetic Materials
Fiber optic sensor
Physics::Accelerator Physics
0210 nano-technology
business
Refractive index
Subjects
Details
- ISSN :
- 00304018
- Volume :
- 379
- Database :
- OpenAIRE
- Journal :
- Optics Communications
- Accession number :
- edsair.doi...........bb9deed06582a129285a99886cdc6e22