. . . . . . . . . .    ANM 2010     3rd International Conference on Advanced Nano Materials     12-15 September 2010 - Agadir, Morocco Back    Abstract ANMM116 ENHANCING LIGHT TRANSMISSION THROUGH A SUBWAVELENGTH APERTURE O. Mahboub, C. Genet, T. W. Ebbesen ISIS, Université de Strasbourg - CNRS (UMR 7006), 8 Allée Gaspard Monge, 67000 Strasbourg, France . A sub-wavelength aperture surrounded by periodic concentric rings in gold film, so-called bull’s eye structure, is an optical device that enhances dramatically the optical transmission through the sub-wavelength aperture. This enhancement is found in a narrow band centred on the surface plasmon resonance associated to the surrounding grating. The potential of this device has been well recognized. It has thus already been implemented within photodetector architectures, used as genuine sub-wavelength optical wave plates, for photon sorting, and studied in the context of nanolithography. Yet, an exhaustive exploration of the parameter space defining the optical properties of such structure is still to be done experimentally. This has led us to simple scale laws which are relating the choice of the structural parameters (grating period, groove widths, grooves depths, hole diameter, etc) to the transmission enhancement. Clear physical description is provided by using a simple Huygens-Fresnel model. . © nanoAC . . . . . . . . . .

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