Loading…

Design of MO-SPR sensor element with photonic crystal

•The sensitivity of MO-SPR system by small variations of analyte refractive index is tested to obtain optimal resolution ability.•Besides the key role of metallic layers thicknesses the number and size of bi-layers of photonic crystal are discussed.•Modeled structure is intended as a sensor unit com...

Full description

Saved in:
Bibliographic Details
Published in:Photonics and nanostructures 2018-09, Vol.31, p.77-80
Main Authors: Otipka, P., Vlček, J., Lesňák, M., Sobota, J.
Format: Article
Language:English
Subjects:
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The sensitivity of MO-SPR system by small variations of analyte refractive index is tested to obtain optimal resolution ability.•Besides the key role of metallic layers thicknesses the number and size of bi-layers of photonic crystal are discussed.•Modeled structure is intended as a sensor unit combining MO and SPR effects.•The supplement of photonic crystal (Ta2O5/SiO2)4/Ta2O5 with designed geometrical parameters into MO-SPR bio-chip structure brings the sensitivity increase about 50% in the comparison with convenient MO-SPR chip containing only metallic layers. Magneto-plasmonic response in planar multilayer with prism coupling composed from Fe/Au bi-layer supplied by photonic crystal (Ta2O5 / SiO2 bi-layers) is studied. Modeled structure is intended as a sensor unit combining magneto-optical (MO) and surface-plasmon-resonance (SPR) effects. The sensitivity of MO-SPR system by small variations of analyte refractive index is tested to obtain optimal resolution ability. The non-reciprocal MO-SPR response is studied by means of the function ρ(φ) = (Rp(+) − Rp(−))/(Rp(+) + Rp(−)), where the reflectance Rp depends on the incidence angle φ and external magnetic field orientation by a fixed wavelength. The detection ability is characterized by the angular shift Δφ0 between the null-points of the function ρ that corresponds to the change Δna of analyte refractive index. Besides the key role of metallic layers thicknesses the number and size of Ta2O5/SiO2 bi-layers of photonic crystal are discussed. The magneto-plasmonic response in planar multilayer with prism coupling composed from Fe and Au bilayer supplied by photonic crystal (Ta2O5 / SiO2) is studied. Modeled structure is intended as a sensor unit combining MO and SPR effects.
ISSN:1569-4410
1569-4429
DOI:10.1016/j.photonics.2018.06.007