We reveal the existence of the surface plasmonic lattice solitons (surface PLSs) at the boundary of a semi-infinite metallic-dielectric periodic nanostructure. We find that the truncation of the periodic structure imposes a threshold power for the existence of surface PLSs, and significantly enhances the modal localization. The propagation and excitation of surface PLSs as well as their potential application in the all-optical subwavelength switching are also demonstrated.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: June 11, 2012
Manuscript Accepted: August 2, 2012
Published: September 11, 2012
Yao Kou, Fangwei Ye, and Xianfeng Chen, "Surface plasmonic lattice solitons," Opt. Lett. 37, 3822-3824 (2012)