Effect of patterns and inhomogeneities on the surface of waveguides used for optical waveguide lightmode spectroscopy applications

R. Horvath, J. Voros, R. Graf, G. Fricsovszky, M. Textor, Lars René Lindvold, N.D. Spencer, E. Papp

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    It has been found that patterns acid inhomogeneities on the surface of the waveguide used fur optical waveguide lightmode spectroscopy applications can produce broadening and fine structure in the incoupled light peak spectra. During cell spreading on the waveguide, a broadening of the incoupling peaks is observed, while regular microstructures on the incoupling grating produce shifts and splitting of the peaks. A theoretical model, based on the zigzag wave representation of light propagation in a planar optical waveguide has been developed in order to understand the physical background of the observed effects. Numerical results are given for the different cases observed, and they are compared with the experimental data. Several possible applications of these effects are considered.
    Original languageEnglish
    JournalApplied Physics B-Lasers and Optics
    Volume72
    Issue number4
    Pages (from-to)441-447
    ISSN0946-2171
    DOIs
    Publication statusPublished - 2001

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