Beffara, F., Humbert, G., Auguste, J.-L., Olivo, M., & U. S, D. (2024). Innovative suspended ring core fiber for SERS application. Optics Express, 32(10), 18216. https://doi.org/10.1364/oe.516023
Abstract:
Solid core photonic crystal fibers (SC-PCFs) have garnered attention as probes for surface-enhanced Raman spectroscopy (SERS) due to their potential as optofluidic devices, offering heightened sensitivity and reliability compared to traditional planar/colloidal nanoparticle-based SERS platforms. A smaller core allows for more light interaction but might compromise sensitivity and reliability due to reduced surface area for interaction. Here, we introduce an innovative SC-PCF design aimed at resolving the trade-off between increasing the evanescent field fraction and the core surface area. By substituting a suspended silica rod with a suspended thin-silica ring, we augment the surface area for attached nanoparticles by one order of magnitude while retaining a substantial amount of evanescent light interaction with the analyte. Experimental findings showcase an improved sensitivity in SERS signal compared to previously reported top-performing PCF sensor designs. Importantly, with necessary refinement and optimization, this innovative fiber design extends beyond SERS applications, potentially amplifying the sensitivity of various other fiber-based sensing platforms.
License type:
Attribution 4.0 International (CC BY 4.0)
Funding Info:
This research / project is supported by the National Research Foundation Singapore/ Agence Nationale de la Recherche - ANR-NRF grant
Grant Reference no. : NRF2021-NRF-ANR002 FUNSENS
This research / project is supported by the A*STAR - CRF (UIBR) grant
Grant Reference no. : NA
The authors acknowledge Institutional funding support from XLIM Research Institute and the A*STAR graduate academy (A*STAR Research and Attachment Program). Authors also acknowledge the funding support from the Fibosome New Aquitaine. This work was conducted within the framework of the International Research Project “FiberMed” between CNRS (INSIS), A*STAR and Univ. Limoges. The authors acknowledge CALI (CAlcul en LImousin) for the simulation and Platinom platform for the fabrication of the opticalnfibers.