High sensitivity sensors made of perforated waveguides

Koichi Awazu, Carsten Rockstuhl, Makoto Fujimaki, Nobuko Fukuda, Junji Tominaga, Tetsuro Komatsubara, Takahiro Ikeda, Yoshimichi Ohki

    Research output: Contribution to journalArticle

    57 Citations (Scopus)

    Abstract

    Sensors based on surface plasmons or waveguide modes are at the focus of interest for applications in biological or environmental chemistry. Waveguide-mode spectra of 1 μm-thick pure and perforated silica films comprising isolated nanometric holes with great aspect ratio were measured before and after adhesion of streptavidin at concentrations of 500 nM. The shift of the angular position for guided modes was nine times higher in perforated films than in bulk films. Capturing of streptavidin in the nanoholes is at the origin of that largely enhanced shift in the angular position as the amplitude of the guided mode in the waveguide perfectly overlaps with the perturbation caused by the molecules. Hence, the device allows for strongly confined modes and their strong perturbation to enable ultra-sensitive sensor applications.

    Original languageEnglish
    Pages (from-to)2592-2597
    Number of pages6
    JournalOptics Express
    Volume15
    Issue number5
    DOIs
    Publication statusPublished - 2007 Mar 5

    Fingerprint

    waveguides
    sensitivity
    sensors
    environmental chemistry
    perturbation
    shift
    plasmons
    aspect ratio
    adhesion
    chemistry
    silicon dioxide
    molecules

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Awazu, K., Rockstuhl, C., Fujimaki, M., Fukuda, N., Tominaga, J., Komatsubara, T., ... Ohki, Y. (2007). High sensitivity sensors made of perforated waveguides. Optics Express, 15(5), 2592-2597. https://doi.org/10.1364/OE.15.002592

    High sensitivity sensors made of perforated waveguides. / Awazu, Koichi; Rockstuhl, Carsten; Fujimaki, Makoto; Fukuda, Nobuko; Tominaga, Junji; Komatsubara, Tetsuro; Ikeda, Takahiro; Ohki, Yoshimichi.

    In: Optics Express, Vol. 15, No. 5, 05.03.2007, p. 2592-2597.

    Research output: Contribution to journalArticle

    Awazu, K, Rockstuhl, C, Fujimaki, M, Fukuda, N, Tominaga, J, Komatsubara, T, Ikeda, T & Ohki, Y 2007, 'High sensitivity sensors made of perforated waveguides', Optics Express, vol. 15, no. 5, pp. 2592-2597. https://doi.org/10.1364/OE.15.002592
    Awazu K, Rockstuhl C, Fujimaki M, Fukuda N, Tominaga J, Komatsubara T et al. High sensitivity sensors made of perforated waveguides. Optics Express. 2007 Mar 5;15(5):2592-2597. https://doi.org/10.1364/OE.15.002592
    Awazu, Koichi ; Rockstuhl, Carsten ; Fujimaki, Makoto ; Fukuda, Nobuko ; Tominaga, Junji ; Komatsubara, Tetsuro ; Ikeda, Takahiro ; Ohki, Yoshimichi. / High sensitivity sensors made of perforated waveguides. In: Optics Express. 2007 ; Vol. 15, No. 5. pp. 2592-2597.
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