Surface Plasmon Polaritons Excited by Narrow Beam in Kretschmann Structure
FDTD method is used to simulate SPPs in the Kretschmann structure. It is observed that the surface plasmon wave propagates not only with the attenuation but also with the oscillation. This paper explains the reasons for this phenomenon: the oscillation is caused by coupling of SPPs in the metal - air interface and dielectric - metal interface.
S. Yang and Z. N. Yin, "Surface Plasmon Polaritons Excited by Narrow Beam in Kretschmann Structure", Applied Mechanics and Materials, Vols. 110-116, pp. 1015-1019, 2012