We theoretically study channel plasmon-polaritons (CPPs) with a geometry similar to that in recent experiments at telecommunication wavelengths [ Bozhevolnyi et al., Nature 440, 508 (2006) ]. The CPP modal shape, dispersion relation, and losses are simulated by using the multiple multipole method and the finite difference time domain technique. It is shown that, with an increase of the wavelength, the fundamental CPP mode shifts progressively toward the groove opening, ceasing to be guided at the groove bottom and becoming hybridized with wedge plasmon-polaritons running along the groove edges.
© 2006 Optical Society of America
Original Manuscript: July 31, 2006
Manuscript Accepted: September 14, 2006
Published: November 9, 2006
Esteban Moreno, F. J. Garcia-Vidal, Sergio G. Rodrigo, L. Martin-Moreno, and Sergey I. Bozhevolnyi, "Channel plasmon-polaritons: modal shape, dispersion, and losses," Opt. Lett. 31, 3447-3449 (2006)