Visible-Frequency Dielectric Metasurfaces for Multiwavelength Achromatic and Highly Dispersive Holograms
2016; American Chemical Society; Volume: 16; Issue: 8 Linguagem: Inglês
10.1021/acs.nanolett.6b02326
ISSN1530-6992
AutoresBo Wang, Fengliang Dong, Qitong Li, Dong Yang, Chengwei Sun, Jianjun Chen, Zhiwei Song, Lihua Xu, Weiguo Chu, Yun‐Feng Xiao, Qihuang Gong, Yan Li,
Tópico(s)Plasmonic and Surface Plasmon Research
ResumoDielectric 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.
Referência(s)