Local electric field enhancement and polarization effects in a surface-enhanced Raman scattering fiber sensor with chessboard nanostructure.
A surface-enhanced Raman scattering fiber sensor with chessboard nanostructure on a cleaved fiber facet is studied by finite-difference time-domain method. Surface plasmons at the metal coated nanostructured fiber facet can be effectively excited and strong local electric field enhancement is obtained. Studies on the influence of light polarization demonstrate a large polarization dependence of the field enhancement factor while the polarization effects on the plasmon resonance wavelength are relatively small.
Chen
Shuqi
S
College of Optical Sciences, The University of Arizona, Tucson, Arizona 85721, USA. schen@optics.arizona.edu
Han
Lin
L
Schülzgen
Axel
A
Li
Hongbo
H
Li
Li
L
Moloney
Jerome V
JV
Peyghambarian
N
N
D004574:Electromagnetic Fields; D055590:Electromagnetic Phenomena / Q000295:instrumentation*; D005336:Fiber Optic Technology / Q000295:instrumentation*; D012031:Refractometry / Q000295:instrumentation*; D013059:Spectrum Analysis, Raman / Q000295:instrumentation*; D014159:Transducers