期刊
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷 109, 期 4, 页码 1071-1074出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s00339-012-7386-4
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We have designed a flat graded index lens made from a metallic graded 2D photonic crystal. The gradient of index has been obtained by varying the filling factor of a flat slab of photonic crystal in the direction perpendicular to that of the propagation of the electromagnetic field. This gradient has been designed in such a way that the flat slab focuses a plane wave. With applications in the microwave range in view, we considered a photonic crystal which consists of copper strips.
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