期刊
OPTICS EXPRESS
卷 20, 期 14, 页码 15882-15890出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.20.015882
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资金
- Hong Kong Research Grants Council (GRF) [CityU 102211, HKUST2/CRF/11G]
- 973 Program of China [2012CB921900]
- National Natural Science Foundation of China [10934003]
We propose an ultra-thin metamaterial constructed by an ensemble of the same type of anisotropic aperture antennas with phase discontinuity for wave front manipulation across the metamaterial. A circularly polarized light is completely converted to the cross-polarized light which can either be bent or focused tightly near the diffraction limit. It depends on a precise control of the optical-axis profile of the antennas on a subwavelength scale, in which the rotation angle of the optical axis has a simple linear relationship to the phase discontinuity. Such an approach enables effective wave front engineering within a subwavelength scale. (C) 2012 Optical Society of America
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