Journal
OPTICS EXPRESS
Volume 17, Issue 20, Pages 18354-18363Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.17.018354
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Following the theoretical work on arbitrary waveguide bends using gradient-index and isotropic materials, a 90-degree bend structure is experimentally realized using artificial metamaterials. Broadband and low-loss unit cells, the I-shaped cells, are used in the laboratory prototype. Field mapping measurement validates the design. The method can be directly and easily extended to the design of directional cloaks, microwave lens, beam shifters, and beam-steering devices. (C) 2009 Optical Society of America
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