Dielectric metasurfaces for beam bending and near-unity numerical aperture lenses
作者： Egor Khaidarov , Ramon Paniagua-Dominguez , Ye Feng Yu , Hanfang Hao , Yuan Hsing Fu
DOI: 10.1109/CLEOPR.2017.8119029
关键词:
摘要: In this work, we propose a novel approach to efficient high-angle light beam bending and demonstrate it using TiO 2 Si metasurfaces operating in the visible near IR spectral ranges. The proposed allows large angle bending, with up 82° experimentally demonstrated. Based on concept designed lens near-unity numerical aperture (NA∼0.99), exceeding all previously reported values.
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