A novel metal–dielectric structure for efficient confinement and guiding of surface plasmon-polaritons is proposed. The proposed quasi-coplanar geometry achieves a trenchlike mode confinement over a wide range of spectrum by substituting a trench structure with two patterned metal layers, which will simplify the fabrication steps significantly. Using the finite-element method, the modal characteristics and the impact of waveguide structural parameters on them were investigated.
© 2007 Optical Society of America
Original Manuscript: July 10, 2007
Revised Manuscript: November 2, 2007
Manuscript Accepted: November 2, 2007
Published: November 21, 2007
Jaeyoun Kim, "Surface plasmon-polariton waveguiding characteristics of metal/dielectric quasi-coplanar structures," Opt. Lett. 32, 3405-3407 (2007)