We demonstrate that the introduction of a subwavelength periodic modulation into a metallic structure strongly modifies the guiding characteristics of the surface plasmon modes supported by the system. Moreover, it is also shown how a new type, to our knowledge, of a tightly confined surface plasmon polariton mode can be created by just milling a periodic corrugation into a metallic ridge placed on top of a metal surface.
© 2010 Optical Society of America
Original Manuscript: November 6, 2009
Revised Manuscript: December 16, 2009
Manuscript Accepted: December 24, 2009
Published: January 29, 2010
M. L. Nesterov, D. Martin-Cano, A. I. Fernandez-Dominguez, E. Moreno, L. Martin-Moreno, and F. J. Garcia-Vidal, "Geometrically induced modification of surface plasmons in the optical and telecom regimes," Opt. Lett. 35, 423-425 (2010)