Light absorption in conical silicon particles.

J Bogdanowicz, M Gilbert, N Innocenti, S Koelling, B Vanderheyden, W Vandervorst

Instituut voor Kern- en Stralingsfysika, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium 2IMEC, Kapeldreef 75, B-3000 Leuven, Belgium. Janusz.Bogdanowicz@imec.be

Optics express 2013 Feb 11

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The problem of the absorption of light by a nanoscale dielectric cone is discussed. A simplified solution based on the analytical Mie theory of scattering and absorption by cylindrical objects is proposed and supported by the experimental observation of sharply localized holes in conical silicon tips after high-fluence irradiation. This study reveals that light couples with tapered objects dominantly at specific locations, where the local radius corresponds to one of the resonant radii of a cylindrical object, as predicted by Mie theory.

Citation

J Bogdanowicz, M Gilbert, N Innocenti, S Koelling, B Vanderheyden, W Vandervorst. Light absorption in conical silicon particles. Optics express. 2013 Feb 11;21(3):3891-6