Title of article :
Optimization of plasmon excitation at structured apertures
Author/Authors :
Popov، Evgeny نويسنده , , Nevière، Michel نويسنده , , Fehrembach، Anne-Laure نويسنده , , Bonod، Nicolas نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Abstract :
Surface plasmon excitation that is due to a single or a structured circular aperture in a flat metallic screen is investigated theoretically and numerically with a view to enhancing the electric field close to the metallic surface. A systematic study of the homogeneous solution of the electromagnetic scattering problem is made with cylindrical coordinates, expanding Maxwell equations on a Fourier-Bessel basis. A perturbation analysis devoted to simple physical analyses of different types of cylindrical nanostructure is developed for the optimization of plasmon excitation by a normally incident linearly polarized monochromatic plane wave. The conclusions drawn from this analysis agree well with the results of rigorous electromagnetic calculations obtained with the differential theory of diffraction in cylindrical coordinates.
Keywords :
Apertures , Surface plasmons
Journal title :
Applied Optics
Journal title :
Applied Optics