Aluminum nanoparticles for plasmon-improved coupling of light into silicon

Thorbjørn Falk Villesen, Christian Uhrenfeldt, Britta Johansen, John Lundsgaard Hansen, Hans Ulrik Ulriksen, Arne Nylandsted Larsen

    Research output: Contribution to journalJournal articleResearchpeer-review

    52 Citations (Scopus)

    Abstract

    This paper investigates the improved photo-current response obtained by depositing Al nanoparticles on top of a Si diode. Well defined Al nanodiscs with a diameter and height of 100 nm are produced on the surface of a Si diode using electron-beam lithography, and the change in photo-current generation is characterized. A blue shift of the photo-current response is demonstrated, substantially improving the relation between gains and losses compared to what is typically observed in similar schemes using Ag nanoparticles. Enhanced photo-current response is observed in diodes with Al particles on the surface at all wavelengths larger than ≈465 nm, thereby minimizing the losses in the blue range usually reported with Ag nanoparticles on the surface
    Original languageDanish
    JournalNanotechnology
    Volume23
    Issue number8
    Pages (from-to)23
    Number of pages8
    ISSN0957-4484
    DOIs
    Publication statusPublished - Mar 2012

    Cite this