title: Multiscale beam evolution and shaping in corrugated plasmonic systems.
abstract: We analyze, theoretically and experimentally, the dynamics of the wavepackets in plasmonic beaming devices, and show that the beam evolution in this class of structures is a multiscale phenomenon, which initiates in the near-field proximity of the device, develops continuously over a new length scale many times the wavelength of the light, and is completed well into the far-field of the system. We develop a quantitative description of the light evolution in the beaming structures and verify our theoretical predictions with experiments. Our analytical results are utilized to develop plasmonic geometries for shaping the mid-field beam evolution, and experimental results from these structures are demonstrated.
authors.affiliation: Department of Physics, Oregon State University, 301 Weniger Hall, Corvallis, Oregon 97331, USA.
authors.forename: S
authors.initials: S
authors.lastname: Thongrattanasiri
authors.forename: D C
authors.initials: DC
authors.lastname: Adams
authors.forename: D
authors.initials: D
authors.lastname: Wasserman
authors.forename: V A
authors.initials: VA
authors.lastname: Podolskiy