Visible-Frequency Dielectric Metasurfaces for Multiwavelength Achromatic and Highly Dispersive Holograms

Dielectric metasurfaces built up with nanostructures of high refractive index represent a powerful platform for highly efficient flat optical devices due to their easy-tuning electromagnetic scattering properties and relatively high transmission efficiencies. Here we show visible-frequency silicon m...

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Bibliographic Details
Published in:Nano letters 2016-08, Vol.16 (8), p.5235-5240
Main Authors: Wang, Bo, Dong, Fengliang, Li, Qi-Tong, Yang, Dong, Sun, Chengwei, Chen, Jianjun, Song, Zhiwei, Xu, Lihua, Chu, Weiguo, Xiao, Yun-Feng, Gong, Qihuang, Li, Yan
Format: Article
Language:English
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Summary:Dielectric metasurfaces built up with nanostructures of high refractive index represent a powerful platform for highly efficient flat optical devices due to their easy-tuning electromagnetic scattering properties and relatively high transmission efficiencies. Here we show visible-frequency silicon metasurfaces formed by three kinds of nanoblocks multiplexed in a subwavelength unit to constitute a metamolecule, which are capable of wavefront manipulation for red, green, and blue light simultaneously. Full phase control is achieved for each wavelength by independently changing the in-plane orientations of the corresponding nanoblocks to induce the required geometric phases. Achromatic and highly dispersive meta-holograms are fabricated to demonstrate the wavefront manipulation with high resolution. This technique could be viable for various practical holographic applications and flat achromatic devices.
ISSN:1530-6984
1530-6992
DOI:10.1021/acs.nanolett.6b02326