Resonance waveguide reflectors with semi-wide bandwidth at the visible wavelengths

Toni Saastamoinen*, Tapani Alasaarela, Anni Lehmuskero, Ismo Vartiainen, Noora Heikkilä, Markku Kuittinen

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)

    Abstract

    We present a resonance waveguide grating with relatively wide bandwidth in the visible region of the spectrum compared to typical resonance structures. The reflective properties of the grating are based on amorphous atomic layer deposited titanium dioxide which has rather high refractive index at the visible wavelengths. The resonance grating provides approximately 20-30 nm bandwidth with over 90% reflectance at the visible wavelengths. The measured reflectances of the fabricated elements show also very good agreement with the theoretical predictions. These kind of reflectors may be useful in applications that make use of LED sources.

    Original languageEnglish
    Pages (from-to)2126-2132
    Number of pages7
    JournalOptics Express
    Volume19
    Issue number3
    DOIs
    Publication statusPublished - 31 Jan 2011
    MoE publication typeA1 Journal article-refereed

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  • Cite this

    Saastamoinen, T., Alasaarela, T., Lehmuskero, A., Vartiainen, I., Heikkilä, N., & Kuittinen, M. (2011). Resonance waveguide reflectors with semi-wide bandwidth at the visible wavelengths. Optics Express, 19(3), 2126-2132. https://doi.org/10.1364/OE.19.002126