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Shaping 3D Path of Electromagnetic Waves Using Gradient-Refractive-Index Metamaterials
Wei Xiang Jiang1, Shuo Ge2, Tiancheng Han3
1State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 P.R. China; Synergetic Innovation Center of Wireless Communication Technology Nanjing 210096 P.R. China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|December 17, 2016
Summary
This study introduces an all-dielectric semispherical lens that manipulates 3D wave propagation. The lens acts as a magnifier for subwavelength sources and guides external waves into spiral paths.
Area of Science:
- Optics and Photonics
- Metamaterials
- Wave Phenomena
Background:
- Controlling three-dimensional (3D) wave propagation is crucial for advanced optical applications.
- Subwavelength imaging and wave manipulation require novel optical components.
Purpose of the Study:
- To propose and experimentally verify an all-dielectric semispherical lens for shaping 3D wave-propagation paths.
- To demonstrate the lens's dual functionality as a subwavelength magnifier and a spiral wave-guiding device.
Main Methods:
- Fabrication and characterization of an all-dielectric semispherical lens.
- Experimental investigation of wave propagation when sources are inside the lens.
- Experimental investigation of wave propagation when electromagnetic waves impinge from outside.
Main Results:
- The semispherical lens successfully magnifies radiation sources to resolve them at the subwavelength scale.
- External electromagnetic waves are demonstrated to be guided spirally inward by the lens.
- The proposed lens exhibits versatile wave-shaping capabilities in 3D.
Conclusions:
- An all-dielectric semispherical lens offers a novel approach to controlling 3D wave propagation.
- The lens demonstrates potential for subwavelength imaging and complex wave manipulation.
- Experimental verification confirms the predicted functionalities, paving the way for new optical device designs.
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