Title :
A flat metamaterial lens working in reflection geometry
Author :
Xin Li ; Shiyi Xiao ; Bengeng Cai ; Qiong He ; Tie Jun Cui ; Lei Zhou
Author_Institution :
State Key Lab. of Surface Phys. & Key Lab. of Micro & Nano Photonic Struct. (Minist. of Educ.), Fudan Univ., Shanghai, China
Abstract :
We show that a flat metasurface with a parabolic reflection-phase distribution can focus an impinging plane wave to a point image in reflection geometry. Our system is much thinner than conventional geometric-optics devices, and does not suffer the energy-loss issues encountered by many metamaterial devices working in transmission geometry. We designed realistic microwave samples and performed near-field scanning experiments to verify the focusing effect. Experimental results are in excellent agreement with full wave simulation and theoretical analyses.
Keywords :
electromagnetic wave reflection; geometrical optics; microwave metamaterials; energy-loss; flat metamaterial lens; flat metasurface; focusing effect; full wave simulation; geometric-optics devices; impinging plane wave; metamaterial devices; near-field scanning experiments; parabolic reflection-phase distribution; point image; reflection geometry; transmission geometry; Finite difference methods; Focusing; Geometry; Lenses; Reflection; Surface waves; Time domain analysis;
Conference_Titel :
Metamaterials (Meta), 2012 International Workshop on
Conference_Location :
Nanjing
Print_ISBN :
978-1-4673-2807-4
DOI :
10.1109/META.2012.6464950
