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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/18674

Title: Photonic studies on polymer-coated sapphire-spheres: A model system for biological ligands
Authors: Murib, M. S.
YEAP, Weng Siang
Liu, X.
Bienstman, P.
Fahlman, M.
Schoening, M. J.
Michiels, Luc
Serpenguzel, A.
WAGNER, Patrick
Issue Date: 2015
Citation: SENSORS AND ACTUATORS A-PHYSICAL, 222, p. 212-219
Abstract: In this study we show an optical biosensor concept, based on elastic light scattering from sapphire micro-spheres. Transmitted and elastic scattering intensity of the microspheres (radius 500 mu m, refractive index 1.77) on an optical fiber half coupler is analyzed at 1510 nm. The 0.43 nm angular mode spacing of the resonances is comparable to the angular mode spacing value estimated using the optical size of the microsphere. The spectral linewidths of the resonances are in the order of 0.01 am, which corresponds to quality factors of approximately 10(5). A polydopamine layer is used as a functionalizing agent on sapphire microspherical resonators in view of biosensor implementation. The varying layer thickness on the microsphere is determined as a function of the resonance wavelength shift. It is shown that polymer functionalization has a minor effect on the quality factor. This is a promising step toward the development of an optical biosensor. (C) 2014 Elsevier B.V. All rights reserved.
Notes: [Murib, M. S.; Yeap, W. S.; Haenen, K.; Wagner, P.] Hasselt Univ, Inst Mat Res IMO, B-3590 Diepenbeek, Belgium. [Martens, D.; Bienstman, P.] Ghent Univ INTEC, Dept Informat Technol, Photon Res Grp, B-9000 Ghent, Belgium. [Liu, X.; Fahlman, M.] Linkoping Univ, Dept Phys Chem & Biol, S-58183 Linkoping, Sweden. [Schoening, M. J.] Aachen Univ Appl Sci, Inst Nano & Biotechnol, D-52428 Julich, Germany. [Michiels, L.] Hasselt Univ, Biomed Res Inst BIOMED, B-3590 Diepenbeek, Belgium. [Haenen, K.] IMEC VZW, IMOMEC, B-3590 Diepenbeek, Belgium. [Serpenguzel, A.] Koc Univ, Microphoton Res Lab, Dept Phys, TR-34450 Istanbul, Turkey.
URI: http://hdl.handle.net/1942/18674
DOI: 10.1016/j.sna.2014.11.024
ISI #: 000349573400025
ISSN: 0924-4247
Category: A1
Type: Journal Contribution
Validation: ecoom, 2016
Appears in Collections: Research publications

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