, Volume 4, Issue 2, pp 153-159
Date: 17 Mar 2009

Unidirectional Surface Plasmon Polariton Excitation on Single Slit with Oblique Backside Illumination

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We have theoretically investigated the unidirectional surface plasmon polariton (SPP) excitation on single slits with oblique backside illumination. An aperture diffraction method is devised, from which the conditions of slit width and beam illumination angle for the unidirectional SPP excitation are formulated analytically. The derived unidirectional conditions are validated with vectorial electromagnetic simulation using the rigorous coupled wave analysis.