期刊
APPLIED PHYSICS LETTERS
卷 96, 期 4, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3291675
关键词
aluminium; light absorption; light polarisation; metamaterials; nanophotonics; nanowires
资金
- Engineering and Physical Sciences Research Council (U.K.) [EP/F040644/1, EP/C511786/1]
- Royal Society
- Engineering and Physical Sciences Research Council [EP/G060363/1, EP/F040644/1] Funding Source: researchfish
- EPSRC [EP/F040644/1, EP/G060363/1] Funding Source: UKRI
We report that subwavelength localization of light in the near-field of a double-periodic photonic metamaterial may be efficiently controlled by the polarization and wavelength of the incident radiation. A dramatic variation in the periodic near-field landscapes, including a transition from a pattern of isolated subwavelength plasmon hot-spots to a blurred, low contrast pattern, accompanied by a change in the pattern's symmetry has been observed in the proximity of an aluminum nanowire fish-scale nanostructure. Hot-spots as small as 0.23 lambda have been achieved and their position has been controlled by tuning the wavelength of incident light across the dipole absorption resonance of the metamaterial. A simple switch of the polarization state can lead to a spatial period doubling in the landscape pattern.
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