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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...
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Published in: | Photonics and nanostructures 2018-09, Vol.31, p.77-80 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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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. |
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ISSN: | 1569-4410 1569-4429 |
DOI: | 10.1016/j.photonics.2018.06.007 |