title: Unidirectional excitation of surface plasmons by slanted gratings.
abstract: Surface plasmon excitation by normally incident light on surface-relief metallic diffraction gratings is studied numerically. Predominantly unidirectional excitation is achieved with a grating of either a slanted lamellar or an inclined sinusoidal groove profile, both having shallow depths. Maps of Poynting vector illustrate that the energy flow turns from normal incidence in the far-field region to a pattern almost parallel to the grating surface in the required direction of excitation of a single SPP wave.
authors: Nicolas
authors: N
authors: Bonod
authors: Evgeny
authors: E
authors: Popov
authors: Lifeng
authors: L
authors: Li
authors: Boris
authors: B
authors: Chernov