Optimization of SERS Sensing With Micro-Lensed Optical Fibers and Au Nano-Film

Optimization of SERS Sensing With Micro-Lensed Optical Fibers and Au Nano-Film

We present the fabrication and characterization of optical fiber reflection probes based on surface-enhanced Raman scattering (SERS) and micro-lensed multimode fibers. For the SERS substrate, a nano-sphere lithography method is used. Comparison of SERS measurements with three different fiber probe c...

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Veröffentlicht in:Journal of lightwave technology 2020-04, Vol.38 (7), p.2081-2085
Hauptverfasser: Milenko, Karolina, Fuglerud, Silje S., Aksnes, Astrid, Ellingsen, Reinold, Hjelme, Dag R.
Format: Artikel
Sprache:eng
Schlagworte:
Configurations
Fabrication
Fiber optics
Gold
nanoparticles
nanophotonics
Optical fibers
optical sensors
Optimization
Probes
Raman scattering
Raman spectra
Reflection
Rhodamine 6G
Sea measurements
Substrates
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Beschreibung
Zusammenfassung:We present the fabrication and characterization of optical fiber reflection probes based on surface-enhanced Raman scattering (SERS) and micro-lensed multimode fibers. For the SERS substrate, a nano-sphere lithography method is used. Comparison of SERS measurements with three different fiber probe configurations is presented. The proposed optimized structure shows a five times increase in SERS signal for dried Rhodamine 6G (R6G) and two times for aqueous R6G in comparison to a standard reflection configuration. Measurements of different concentrations of R6G in a water solution with an limit of detection (LOD) equal to 10 −7  M are demonstrated.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2019.2958128