Highly-efficient full-color holographic movie based on silicon nitride metasurface
Author:
Yamaguchi Masakazu1, Saito Hiroki2, Ikezawa Satoshi3ORCID, Iwami Kentaro12ORCID
Affiliation:
1. Department of Bio-Functions and Systems Science , Tokyo University of Agriculture and Technology , Koganei , Tokyo 184–8588 Japan 2. Department of Mechanical Systems Engineering , Tokyo University of Agriculture and Technology , Koganei , Tokyo 184–8588 Japan 3. Waseda Research Institute for Science and Engineering, Waseda University , Shinjuku , Tokyo 169–8555 Japan
Abstract
Abstract
Metasurface holograms offer various advantages, including wide viewing angle, small volume, and high resolution. However, full-color animation of high-resolution images has been a challenging issue. In this study, a full-color dielectric metasurface holographic movie with a resolution of 2322 × 2322 was achieved by spatiotemporally multiplexing 30 frames with blue, green, and red color channels at the wavelengths of 445 nm, 532 nm, and 633 nm at the maximum reconstruction speed of 55.9 frames per second. The high average transmittance and diffraction efficiency of 92.0 % and 72.7 %, respectively, in the visible range, were achieved by adopting polarization-independent silicon nitride waveguide meta-atoms, resulting in high color reproducibility. The superposition of three wavelengths was achieved by adjusting the resolutions and positions of target images for each wavelength while maintaining the meta-atom pitch constant. The improvement in diffraction efficiency was brought about by the optimization of etching conditions to form high-aspect vertical nanopillar structures.
Funder
Ministry of Education, Culture, Sports, Science and Technology Japan Society for the Promotion of Science
Publisher
Walter de Gruyter GmbH
Subject
Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology
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