Recent advances in multi-dimensional metasurfaces holographic technologies
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PhotoniX Open Access
Recent advances in multi-dimensional metasurfaces holographic technologies Ruizhe Zhao, Lingling Huang* and Yongtian Wang* * Correspondence: huanglingling@ bit.edu.cn; [email protected] School of Optics and Photonics, Beijing Institute of Technology, Beijing 100081, China
Abstract Holography has attracted tremendous interest due to its capability of storing both the amplitude and phase of light field and reproducing vivid three-dimensional scenes. However, the large pixel size, low resolution, small field-of-view (FOV) and limited space-bandwidth of traditional spatial light modulator (SLM) devices restrict the possibility of improving the quality of reconstructed images. With the development of nanofabrication technologies, metasurfaces have shown great potential in manipulating the amplitude, phase, polarization, frequency or simultaneously multiple parameters of output light in ultrashort distance with subwavelength resolution by tailoring the scattering behaviour of consisted nanostructures. Such flexibilities make metasurface a promising candidate for holographic related applications. Here, we review recent progresses in the field of metasurface holography. From the perspective of the fundamental properties of light, we classify the metasurface holography into several categories such as phaseonly holography, amplitude-only holography, complex amplitude holography and so on. Then, we introduce the corresponding working principles and design strategies. Meanwhile, some emerging types of metasurface holography such as tunable holography, nonlinear holography, Janus (or directional related) and bilayer metasurfaces holography are also discussed. At last, we make our outlook on metasurface holography and discuss the challenges we may face in the future. Keywords: Metasurface, Holography, Wavefront modulation
Introduction Holography invented by Gabor provides a promising technology for restoring and reconstructing the full wave information of object targets. The holograms are generated by the interference between the reference beam and objective beam. When the reference beam illuminating on the hologram, the reconstructed images can be observed on the predefined position [1]. While in 1966, Lohmann and Brown proposed and fabricated the computer generated holography for spatial filter for the first time by introducing the sampling law and detour phase coding method [2]. Holographic related technologies have been applied in many areas such as display, imaging, optical data storage, microscopy and metrology [3]. Fukushima et al. realized the first real-time hologram by using an opticallyaddressable ferroelectric liquid-crystal spatial light modulator in 1990 [4]. A holographic © The Author(s). 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to th
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