Journal
OPTICS EXPRESS
Volume 19, Issue 24, Pages 23908-23920Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.19.023908
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Funding
- National Natural Science Foundation of China [60736041, 10874238]
- National Key Basic Research Special Foundation of China [2007CB613205, 2011CB922002]
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We report a method in the framework of surface wave holography to manipulate the electromagnetic wave on the metallic surface for realizing complicated electromagnetic wave transport functionalities in three-dimensional (3D) space. The method allows for direct determination of the metallic surface structure morphology for a given transport functionality, by means of writing desirable object information on the metallic surface via interference with a reference surface wave. We have employed the analytical approach to design and build metallic surface structures that realize arbitrary single-point focusing, arbitrary singledirection beam collimation, and simultaneous two-point focusing of electromagnetic wave in 3D space. Good agreement between numerical simulations and microwave experimental measurements has been found and confirms the power of the method in conceptually understanding and exploiting the surface electromagnetic wave on subwavelength metal structures. (C) 2011 Optical Society of America
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