Plate-Focusing Based on a Meta-Molecule of Dendritic Structure in the Visible Frequency

Molecules

Xiaopeng Zhao¹  Di An¹  Suna Cheng¹  Huan Chen¹ 

[1] Smart Materials Laboratory, Department of Applied Physics, Northwestern Polytechnical University, Xi’an 710129, China;

关键词: dendritic structure;    anomalous reflection;    anomalous refraction;    visible light;    plate-focusing metasurface;   

DOI  :  10.3390/molecules23061323

来源: DOAJ

【 摘 要 】

To study the potential application of metasurfaces in lens technology, we propose a dendritic meta-molecule surface (also referred to as a dendritic metasurface) and realize the focusing effect in the visible spectrum through simulations and experiments. Using asymmetric dendritic structures, this metasurface can achieve distinct broadband anomalous reflection and refraction. When the metasurface is rotated by 180° around the z axis, anomalous reflection and refraction in vertically incident optical waves are in opposite directions. Considering this feature, a metasurface is designed to achieve a prominent plate-focusing effect. Samples with a transmission peak of green light at 555 nm, yellow light at 580 nm, and red light at 650 nm were prepared using bottom-up electrochemical deposition, and the focus intensity of approximately 10% and focal length of almost 600 µm were experimentally demonstrated.

【 授权许可】

Unknown