By Wei qunshuo, Hao Qun
Title:
Color printing and holography based on all medium metameric surface
Completed by: Beijing University of Technology
Summary
Professor Huang Lingling, Professor Wang Yongtian and Professor Thomas zentgraf from the school of optoelectronics, Beijing University of science and technology, and Professor Thomas zentgraf from the University of Paderborn, Germany, published a project titled "simulated spectral and spatial modulation for color printing and holography using all digital" in nano letters in November 2019 In metasurfaces' paper, we propose a kind of all dielectric metaglume surface which can combine color printing and holographic technology, and can simultaneously modulate the spectral response and spatial phase distribution of the outgoing wave front. This kind of super glume surface has a broad prospect in the frontier applications of data storage, image encryption and optical anti-counterfeiting.
Research background
The metaglume surface has the ability to modulate the phase, amplitude and polarization of the incident electromagnetic wave on the subwavelength scale. In recent years, it has made rapid development in holographic display, interferometry, data storage and so on. Compared with the traditional holographic display technology based on spatial light modulator, this method has the characteristics of ultra-thin and compact, which greatly promotes the miniaturization of holographic devices, and overcomes the challenges faced by the traditional holography, such as the existence of multi-level diffraction level crosstalk, small field angle, narrow band width, twin images, etc The reproduction quality of the target image is improved.
Problems faced
Color printing based on spectral response of hyperglume surface is a potential technology. However, the common hyperglume surface holograms usually show random and non characteristic patterns under the illumination of incoherent light, which can not be used to modulate the spectral response. In order to make full use of the excellent wave front control ability and high design freedom of the superfine surface, there is an urgent need to modulate the spatial information and spectral information of the wavefront simultaneously through a single-layer superfine surface, and combine the micro nano holography with the color printing technology to further improve the information capacity of the Hyper glume surface.
Technological breakthrough
The whole medium metameric surface proposed by the research group has a dual working mode, which presents a micro color image under white light irradiation, while a very low crosstalk high-quality color holographic display can be realized under a specific coherent monochromatic laser irradiation. In this method, a variety of amorphous silicon nanoantennae corresponding to the spectral response of different structures are used as the basic components. Based on the principle of Berry phase modulation, the spectral response and spatial phase information can be encoded simultaneously and independently by using only a single super glume surface. In this method, phase recovery is realized by parallel GS algorithm. According to the pattern area division in color printing mode, the spatial position of the wavelength multiplexing hologram is indexed. At the same time, the phase distribution for each wavelength is obtained independently, which significantly improves the quality of hologram reproduction and reduces crosstalk. By using the above algorithm, the combination of color printing and holography technology is realized on the surface, and good experimental results are obtained in both working modes.
Fig. 1 dual operation mode of color printing and holographic multiplexing on a single-layer all dielectric metameric surface under incoherent light and laser illumination
Team Introduction
Wang Yongtian, Professor, doctoral director, School of Optoelectronics and computer science, Beijing University of technology, distinguished professor of Changjiang Scholars, Ministry of education, director of Beijing mixed reality and new display engineering technology research center. He has been engaged in teaching and scientific research in technical optics and virtual reality for a long time.
Huang Lingling, professor and doctoral director of Beijing University of technology. He was selected as a young Yangtze River scholar of the Ministry of education and an outstanding young scientist of Beijing. Mainly engaged in the research of micro and nano optical functional devices and physical mechanism.
In recent years, the team has carried out a series of innovative work in the field of hyperglume surface holography, including the research on Coaxial / off-axis hybrid 3D holographic multiplexing such as polarization / position / angle of hyperglume surface (adv. mat. 27, 6444, 2015); The research on vector holographic display of 12 different polarization channels on the surface of hyperglume is carried out, which shows a new method to realize triple information encryption dimension with high security (light. SCI. & appl. 7:95, 2018); the hologram based on polarization and propagation direction encryption of the cascaded surface of hyperglume is constructed (nano lett. 19, 3976-3980, 2019); and the realization of quantitative correlation amplitude holography (adv Opt. Mat. 1901169, 2019). The relevant research results were published by physics.org of Royal physical society, chemical & Engineering of ACS of American Chemical Society and materials views China of Wiley.
Source of this article
Article link: (please click to read the original)
Simultaneous Spectral and Spatial Modulation for Color Printing and Holography Using All-Dielectric Metasurfaces, Nano letters 19, 8964-8971 (2019).
DOI: 10.1021/acs.nanolett.9b03957
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