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Diffraction-free surface waves by metasurfaces
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DOI：10.1364/OL.39.005888.png)
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We propose a method to design and realize planar Bessel lens using artificial metasurfaces to produce diffraction-free surface waves. The planar Bessel lens is composed of two sublenses: a half Maxwell fisheye lens which can shape the surface cylindrical waves to surface plane waves, and an inhomogeneous flat lens which can convert the surface plane waves into approximate diffraction-free surface waves in a diamond-shaped focusing area. Through the planar Bessel lens, a point source on the metasurface directly radiates the diffraction-free surface waves. In realization, we construct the inhomogeneous metasurfaces by subwavelength metallic patches printed on a grounded dielectric substrate. Simulation and experimental results have good agreements, which jointly show the formation of the diffraction- free surface waves in the microwave band. (C) 2014 Optical Society of America
Keyword:
GENERATION
BEAMS
METAMATERIALS
REFLECTION
OPTICS
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期刊
IF:
3.3
论文数:
4.0W
被引数:
7.6W
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引用论文
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