All-dielectric meta-holograms with holographic images transforming longitudinally

Qiu Wang, Quan Xu, Xueqian Zhang, Chunxiu Tian, Yuehong Xu, Jianqiang Gu, Zhen Tian, Chunmei Ouyang, Xixiang Zhang, Jiaguang Han, Weili Zhang

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Metasurfaces are unique subwavelength geometries capable of engineering electromagnetic waves at will, delivering new opportunities for holography. Most previous meta-holograms, so-called phase-only meta-holograms, modulate only the amplitude distribution of a virtual object, and require optimizing techniques to improve the image quality. However, the phase distribution of the reconstructed image is usually overlooked in previous studies, leading to inevitable information loss. Here, we demonstrate all-dielectric meta-holograms that allow tailoring of both the phase and amplitude distributions of virtual objects. Several longitudinal manipulations of the holographic images are theoretically and experimentally demonstrated, including shifting, stretching, and rotating, enabling a large depth of focus. Furthermore, a new meta-hologram with a three-dimensional holographic design method is demonstrated with an even enhanced depth of focus. The proposed meta-holograms offer more freedom in holographic design and open new avenues for designing complex three-dimensional holography.
Original languageEnglish (US)
Pages (from-to)599-606
Number of pages8
JournalACS Photonics
Volume5
Issue number2
DOIs
StatePublished - Dec 6 2017

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