Polymeric slot waveguide interferometer for sensor applications

Marianne Hiltunen (Corresponding Author), Jussi Hiltunen, P Stenberg, Sanna Aikio, Lauri Kurki, P Vahimaa, P Karioja

    Research output: Contribution to journalArticleScientificpeer-review

    40 Citations (Scopus)


    A refractive index sensor based on slot waveguide Young interferometer was developed in this work. The interferometer was fabricated on a polymer platform and operates at a visible wavelength of 633 nm. The phase shift of the interference pattern was measured with various concentrations of glucose-water solutions, utilizing both TE and TM polarization states. The sensor was experimentally observed to detect a refractive index difference of 6.4 * 10-6 RIU. Furthermore, the slot Young interferometer was found to compensate for temperature variations. The results of this work demonstrate that high performance sensing capability can be obtained with a polymeric slot Young interferometer, which can be fabricated by a simple molding process
    Original languageEnglish
    Pages (from-to)7229-7237
    Number of pages8
    JournalOptics Express
    Issue number6
    Publication statusPublished - 2014
    MoE publication typeA1 Journal article-refereed


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