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High Efficiency Near Diffraction-Limited Mid-Infrared Flat Lenses Based on Metasurface Reflectarrays

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Abstract

We report the first mid-infrared flat lens based on the reflectarrays with focusing efficiency (70%), which is the highest reported so far for reflectarray-based lenses. Experiments and simulations show that the focusing is near diffraction-limited.

© 2016 Optical Society of America

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