期刊
OPTICS EXPRESS
卷 19, 期 10, 页码 9269-9281出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.19.009269
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资金
- ONR [N00014-07-1-0457]
- NSF [ECCS-0724763]
- AFRL [FA8650-08-C-1445]
- AFOSR [FA9550-10-1-0226]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1041820] Funding Source: National Science Foundation
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. (C) 2011 Optical Society of America
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