Multiscale beam evolution and shaping in corrugated plasmonic systems

作者：Thongrattanasiri S^*; Adams D C; Wasserman D; Podolskiy V A

来源：Optics Express, 2011, 19(10): 9269-9281.

DOI：10.1364/OE.19.009269

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.

• 出版日期2011-5-9