Sub-wavelength surface gratings for light redirection in transparent substrates

Thomas Buss, Cameron Smith, Mads Brøkner Christiansen, Rodolphe Marie, Anders Kristensen

    Research output: Contribution to journalJournal articleResearchpeer-review


    We demonstrate sub-wavelength grating couplers patterned on glass surfaces which are designed to convert incident free-space radiation into guided modes along the glass material. The devices are fabricated by nanoimprint lithography and the measured optical performance is compared to a simple model based on diffraction and ray-optics, and complemented by numerical simulations. We show that our approach is suitable for redirecting and guiding light over a broad range of incident angles and wavelengths in transparent substrates. The technique has potential applications for solar harvesting in window panes and display applications with minimal influence on vision quality. (C) 2012 American Institute of Physics. []
    Original languageEnglish
    JournalApplied Physics Letters
    Issue number4
    Pages (from-to)043109
    Number of pages4
    Publication statusPublished - 2012


    • Diffraction Gratings
    • Integrated Optics
    • Nanolithography
    • Optical Couplers
    • Optical Fabrication
    • Optical Glass
    • Soft Lithography

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