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Nano Lett. 2016 Aug 10;16(8):5235-40. doi: 10.1021/acs.nanolett.6b02326. Epub 2016 Jul 13.

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

Author information

1
State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University and Collaborative Innovation Center of Quantum Matter , Beijing 100871, China.
2
CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology , Beijing 100190, China.
3
Collaborative Innovation Center of Extreme Optics, Shanxi University , Taiyuan, Shanxi 030006, China.

Abstract

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.

KEYWORDS:

Dielectric metasurface; achromatic hologram; color hologram; highly dispersive hologram; multiwavelength; visible

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