Grating-based guided-mode resonance devices and degradation of their performance in real-life conditions

Aliaksandra Ivinskaya, René Bergmann, Jan Robert Kafka, Fridolin Okkels, Mogens Havsteen Jakobsen

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

    Abstract

    Guided-mode resonances in structures having periodicity along at least one dimension were widely employed in the last decade in various optical devices. Initially it was shown that at frequencies close to the second order band gap periodic structures can feature total reflection of light due to the guided modes propagating along the surface of the grating. As an application, this allows to substitute a thick multilayer Bragg mirror in VCSELs by a thin grating-based mirror. Most devices utilizing guided-mode resonances were theoretically and numerically investigated with the idealized model of an infinite periodic structure illuminated by a plane wave. To see how grating-based components can perform in real life we take into account two critical factors: the finite size of the grating and the Gaussian shape of the light source replacing a plane wave. These factors can significantly change and impair the performance of filters, mirrors, sensors and other devices operating by the guided-mode resonance effect. We also show experimentally that for some kinds of gratings
    guided-mode resonances can vanish if the grating is illuminated by extended source, i.e. heated plate in our case, focused on the sample.
    Original languageEnglish
    Title of host publicationProceedings of SPIE
    Number of pages9
    Volume 8995
    PublisherSPIE - International Society for Optical Engineering
    Publication date2014
    DOIs
    Publication statusPublished - 2014

    Keywords

    • Guided-mode resonance devices
    • Gratings
    • Dielectric mirrors
    • Gaussian source
    • Microstructured surfaces

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