Influence of Substrate on Plasmon-Induced Absorption Enhancements

Kirsi Tappura (Corresponding Author), Juho Luomahaara, Tomi Haatainen, Juha Hassel, Tapani Vehmas

    Research output: Contribution to journalArticleScientificpeer-review

    6 Citations (Scopus)

    Abstract

    A set of periodic plasmonic nanostructures is designed and fabricated as a means to investigate light absorption in single-crystal silicon thin-film structures with siliconon- insulator (SOI) wafers as a model system. It is shown both computationally and experimentally that plasmon-induced absorption enhancement is remarkably higher for such devices than for thick or semi-infinite structures or for the thin-film amorphous silicon solar cells reported in the literature. Experimental photocurrent enhancements of the orders of 12 and 20 are demonstrated for non-optimized 2200-nm-thick photoconductive and 300-nm-thick photovoltaic test structures, respectively. Theoretical absorption enhancements as high as 80 are predicted to be achievable for the similar structures. The features of the spectral enhancements observed are attributed to several interacting resonance phenomena: not just to the favourable scattering of light by the periodic plasmonic nanoparticle arrays into the SOI device layer and coupling to the waveguide modes interacting with the plasmonic array but also to the Fabry-Pérot type interferences in the layered structure. We show that the latter effect gives a significant contribution to the spectral features of the enhancements, although frequently ignored in the discussions of previous reports.
    Original languageEnglish
    Pages (from-to)627-635
    JournalPlasmonics
    Volume11
    Issue number2
    DOIs
    Publication statusPublished - 2016
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Silicon
    Thin films
    Silicon solar cells
    Substrates
    Amorphous silicon
    Photocurrents
    Light absorption
    Nanostructures
    Equipment and Supplies
    Waveguides
    Single crystals
    Scattering
    Nanoparticles
    Light

    Keywords

    • plasmonics
    • thin-filmsilicon
    • silicon-on-insulator
    • absorption enhancement
    • Fabry-Pérot interference
    • multiple resonances

    Cite this

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    title = "Influence of Substrate on Plasmon-Induced Absorption Enhancements",
    abstract = "A set of periodic plasmonic nanostructures is designed and fabricated as a means to investigate light absorption in single-crystal silicon thin-film structures with siliconon- insulator (SOI) wafers as a model system. It is shown both computationally and experimentally that plasmon-induced absorption enhancement is remarkably higher for such devices than for thick or semi-infinite structures or for the thin-film amorphous silicon solar cells reported in the literature. Experimental photocurrent enhancements of the orders of 12 and 20 are demonstrated for non-optimized 2200-nm-thick photoconductive and 300-nm-thick photovoltaic test structures, respectively. Theoretical absorption enhancements as high as 80 are predicted to be achievable for the similar structures. The features of the spectral enhancements observed are attributed to several interacting resonance phenomena: not just to the favourable scattering of light by the periodic plasmonic nanoparticle arrays into the SOI device layer and coupling to the waveguide modes interacting with the plasmonic array but also to the Fabry-P{\'e}rot type interferences in the layered structure. We show that the latter effect gives a significant contribution to the spectral features of the enhancements, although frequently ignored in the discussions of previous reports.",
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    author = "Kirsi Tappura and Juho Luomahaara and Tomi Haatainen and Juha Hassel and Tapani Vehmas",
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    Influence of Substrate on Plasmon-Induced Absorption Enhancements. / Tappura, Kirsi (Corresponding Author); Luomahaara, Juho; Haatainen, Tomi; Hassel, Juha; Vehmas, Tapani.

    In: Plasmonics, Vol. 11, No. 2, 2016, p. 627-635.

    Research output: Contribution to journalArticleScientificpeer-review

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    T1 - Influence of Substrate on Plasmon-Induced Absorption Enhancements

    AU - Tappura, Kirsi

    AU - Luomahaara, Juho

    AU - Haatainen, Tomi

    AU - Hassel, Juha

    AU - Vehmas, Tapani

    N1 - Project code: 76243

    PY - 2016

    Y1 - 2016

    N2 - A set of periodic plasmonic nanostructures is designed and fabricated as a means to investigate light absorption in single-crystal silicon thin-film structures with siliconon- insulator (SOI) wafers as a model system. It is shown both computationally and experimentally that plasmon-induced absorption enhancement is remarkably higher for such devices than for thick or semi-infinite structures or for the thin-film amorphous silicon solar cells reported in the literature. Experimental photocurrent enhancements of the orders of 12 and 20 are demonstrated for non-optimized 2200-nm-thick photoconductive and 300-nm-thick photovoltaic test structures, respectively. Theoretical absorption enhancements as high as 80 are predicted to be achievable for the similar structures. The features of the spectral enhancements observed are attributed to several interacting resonance phenomena: not just to the favourable scattering of light by the periodic plasmonic nanoparticle arrays into the SOI device layer and coupling to the waveguide modes interacting with the plasmonic array but also to the Fabry-Pérot type interferences in the layered structure. We show that the latter effect gives a significant contribution to the spectral features of the enhancements, although frequently ignored in the discussions of previous reports.

    AB - A set of periodic plasmonic nanostructures is designed and fabricated as a means to investigate light absorption in single-crystal silicon thin-film structures with siliconon- insulator (SOI) wafers as a model system. It is shown both computationally and experimentally that plasmon-induced absorption enhancement is remarkably higher for such devices than for thick or semi-infinite structures or for the thin-film amorphous silicon solar cells reported in the literature. Experimental photocurrent enhancements of the orders of 12 and 20 are demonstrated for non-optimized 2200-nm-thick photoconductive and 300-nm-thick photovoltaic test structures, respectively. Theoretical absorption enhancements as high as 80 are predicted to be achievable for the similar structures. The features of the spectral enhancements observed are attributed to several interacting resonance phenomena: not just to the favourable scattering of light by the periodic plasmonic nanoparticle arrays into the SOI device layer and coupling to the waveguide modes interacting with the plasmonic array but also to the Fabry-Pérot type interferences in the layered structure. We show that the latter effect gives a significant contribution to the spectral features of the enhancements, although frequently ignored in the discussions of previous reports.

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    KW - silicon-on-insulator

    KW - absorption enhancement

    KW - Fabry-Pérot interference

    KW - multiple resonances

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