Journal
OPTICS EXPRESS
Volume 21, Issue 22, Pages 27219-27237Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.027219
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Funding
- NSFC [60990321, 11174055, 11204040]
- Program of Shanghai Subject Chief Scientist [12XD1400700]
- MOE of China [B06011]
- China Postdoctoral Science Foundation
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Modeling meta-surfaces as thin metamaterial layers with continuously varying bulk parameters, we employed a rigorous mode-expansion theory to study the scattering properties of such systems. We found that a meta-surface with a linear reflection-phase profile could redirect an impinging light to a non-specular channel with nearly 100% efficiency, and a meta-surface with a parabolic reflection-phase profile could focus incident plane wave to a point image. Under certain approximations, our theory reduces to the local response model (LRM) established for such problems previously, but our full theory has overcome the energy non-conservation problems suffered by the LRM. Microwave experiments were performed on realistic samples to verify the key theoretical predictions, which match well with full-wave simulations. (C)2013 Optical Society of America
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