Fiber Bragg grating; Fiber optic biosensor; HER2 detection; Photonic crystal fiber; Sensor multiplexing; Surface plasmon resonance; Cascaded Bragg gratings; Cladding mode resonances; Epidermal growth factor receptor 2; Human epidermal growth factor; Human epidermal growth factor receptor 2 detection; Photonic-crystal fiber; Plasmonics; Sensors multiplexing; Surface-plasmon resonance; Electronic, Optical and Magnetic Materials; Instrumentation; Condensed Matter Physics; Surfaces, Coatings and Films; Metals and Alloys; Electrical and Electronic Engineering; Materials Chemistry
Abstract :
[en] Spectral multiplexing of biosensors in a single optical fiber has been a long-standing challenge, which we address here for the first time by combining photonic crystal fibers (PCF) with fiber Bragg grating technology. We exploit the features of the optical transmission spectrum of a straight fiber Bragg grating written in a PCF that allows exciting cladding mode resonances within a spectral span of about 60 nm, which is significantly narrower than the width of the transmission spectra of tilted gratings in standard single-mode step-index fibers. More specifically, we consider the cladding mode resonances that feature effective index values close to the refractive index of phosphate buffered saline, and we demonstrate plasmonic label-free biodetection of HER2 (human epidermal growth factor receptor 2) protein. We report on the simultaneous monitoring of the wavelength shifts of said cladding mode resonances from two spatially separated biofunctionalized Bragg gratings and we find that the PCF sensor is able to detect the protein concentration of 8.62 nM with high reproducibility.
Disciplines :
Biochemistry, biophysics & molecular biology
Author, co-author :
Rusyakina, Olga; Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Dept. of Applied Physics and Photonics, Brussels, Belgium ; Electromagnetism and Telecommunication Department, University of Mons, Mons, Belgium
Geernaert, Thomas; Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Dept. of Applied Physics and Photonics, Brussels, Belgium
Loyez, Médéric ; Université de Mons - UMONS > Faculté des Sciences > Service de Protéomie et Microbiologie
Mergo, Pawel; Laboratory of Optical Fibres Technology, Faculty of Chemistry, Institute of Chemical Sciences, Maria Curie-Skłodowska University, Lublin, Poland
Thienpont, Hugo; Brussels Photonics (B-PHOT), Vrije Universiteit Brussel and Flanders Make, Dept. of Applied Physics and Photonics, Brussels, Belgium
Proteomics and Microbiology Electromagnetism and Telecommunications
Research institute :
Biosciences
Funders :
Interreg Fonds De La Recherche Scientifique - FNRS Fonds Wetenschappelijk Onderzoek
Funding text :
This work was supported in part by Fonds Wetenschappelijk Onderzoek (FWO) under Grants G0F6218N (EOS-convention 30467715), 12P1720N, and I013918N; in part by Interreg under Grant NWE758 (Fotonica pilootlijnen); in part by Industrial Research Fund (IOF); in part by Methusalem; in part by the OZR of Vrije Universiteit Brussel; and in part by Fonds National de la Recherche Scientifique (F.R.S.-FNRS). The approach for an external refractometry and biosensing with PCFs with their multiplexing capability has been published on April 7th, 2022, as a patent application entitled “Microstructured optical fiber sensing device” under an international publication number WO 2022/069687 A1. Supplementary data. The file with supplementary data is available online.This work was supported in part by Fonds Wetenschappelijk Onderzoek (FWO) under Grants G0F6218N (EOS-convention 30467715), 12P1720N, and I013918N; in part by Interreg under Grant NWE758 (Fotonica pilootlijnen); in part by Industrial Research Fund (IOF); in part by Methusalem ; in part by the OZR of Vrije Universiteit Brussel; and in part by Fonds National de la Recherche Scientifique (F.R.S.-FNRS).
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