Surface plasmon excitation in fiber-optics sensors: a novel theoretical approach

Author

Esteban, Ó ; Alonso, R. ; Navarrete, M.C. ; Gonzàlez-Cano, A.

Author_Institution

Departamento de Electronica, Univ. de Alcala, Madrid, Spain

Volume

20

Issue

3

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

448

Lastpage

453

Abstract

A theoretical method for the study of surface plasmon excitation in metallic layers, as used in fiber-optics sensors, is presented. It is based in the calculation of the propagated fields in the waveguide structure and allows us to compute the loss of optical power in the fiber (which is the measured parameter) from energy conservation considerations. The agreement with experimental data obtained with real sensors is good. The method is conceptually simple and can be adapted to different configurations of the sensors

Keywords

fibre optic sensors; optical fibre losses; refractive index; surface plasmon resonance; energy conservation considerations; evanescent wave; fiber-optics sensors; fundamental mode; intensity distribution; metallic layers; monomode fiber; optical power loss; polished cladding; propagated fields; surface plasmon excitation; waveguide structure; Optical computing; Optical fiber losses; Optical fiber sensors; Optical propagation; Optical sensors; Optical surface waves; Optical waveguide theory; Optical waveguides; Plasmons; Propagation losses;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/50.988993

Filename

988993