Aluminum nanoparticles for plasmon-improved coupling of light into silicon

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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 100nm 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 ≈465nm, thereby minimizing the losses in the blue range usually reported with Ag nanoparticles on the surface.
Original languageEnglish
JournalNanotechnology
Volume23
Issue8
Pages (from-to)085202
ISSN0957-4484
DOIs
Publication statusPublished - 2 Mar 2012

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