Broadband high-efficiency meta-holography from all-dielectric quasi-continuous metasurfaces

Author:

Liu Kaifeng1,Chen Qinmiao2,Liu Yanlin3,Song Shichao3ORCID,Zhang Haimo1,Shi Lintong1,He Mengyao1,Xiao Siqi1,Xiao Shumin2ORCID,Zhang Xiaohu1ORCID

Affiliation:

1. Key Laboratory of Optoelectronic Technology and Systems of the Education Ministry of China, Chongqing University 1 , Chongqing 400044, China

2. Ministry of Industry and Information Technology Key Lab of Micro-Nano Optoelectronic Information System, Guangdong Provincial Key Laboratory of Semiconductor Optoelectronic Materials and Intelligent Photonic Systems, Harbin Institute of Technology 2 , Shenzhen 518055, China

3. Guangdong Provincial Key Laboratory of Optical Fiber Sensing and Communications, Institute of Photonics Technology, College of Physics and Optoelectronic Engineering, Jinan University 3 , Guangzhou 510632, China

Abstract

The compactness and particular optical design make metasurface a competitive candidate for holographic display and storage. Recently, the selection and optimization for the used metasurface structures and types have become research spots. Now the most researched and demonstrated meta-holograms are often based on discrete structures, which can achieve high efficiency but comparatively narrow working bandwidths or a wide wavelength range but low power efficiency. Therefore, contemporary meta-holograms struggle for realizing simultaneous broadband and high efficiency. In this paper, all-dielectric quasi-continuous metasurfaces composed of nanostrips are introduced to expand the operating bandwidth for high efficiency meta-holography. Benefiting from the associated Pancharatnam–Berry phase, the nanostrips with spatially orientation angles continuous changes can realize arbitrary phase modulation. For the first time, the average power efficiency of a meta-hologram is experimentally measured to be 56.63% over a broad wavelength band ranging from 500 to 1000 nm. In addition, based on this kind of all-dielectric quasi-continuous nanostrips, we also design and experimentally achieve multicolor three-dimensional (3D) holographic images. Actually, such all-dielectric quasi-continuous methodology proposed here can be used to design other functional meta-devices, including optical metalens, nanoprinting, and information encryption.

Funder

Natural Science Foundation of Chongqing

National Natural Science Foundation of China

National Key Research and Development Program of China

Publisher

AIP Publishing

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