We generate self-collimating surface plasmon beams in a doubly periodic plasmonic grating. The self-collimation effect is understood from the local anisotropy of the isofrequency surface of the grating in the vicinity of the bandgap. The properties of the beams are analyzed by leakage radiation microscopy and show to an unprecedented level significantly reduced diffraction as compared with plasmon beams propagating on a flat metal film.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: February 20, 2012
Revised Manuscript: March 27, 2012
Manuscript Accepted: March 28, 2012
Published: May 23, 2012
B. Stein, E. Devaux, C. Genet, and T. W. Ebbesen, "Self-collimation of surface plasmon beams," Opt. Lett. 37, 1916-1918 (2012)