期刊
MICROELECTRONIC ENGINEERING
卷 220, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.mee.2019.111151
关键词
Meta-hologram; 3D imaging; Phase and amplitude modulation; Terahertz
资金
- Science and Technology Innovation Research Project of China Aerospace Science and Technology Corporation [Y-Y-Y-GJGXKZ-18, Z-Y-Y-KJJGTX-17]
- National Natural Science Foundation of China [51803010, 11704231, 11774243, 11774246, 11404224, 11474206]
- Youth Innovative Research Team of Capital Normal University [008/19530050146]
- Beijing Youth TopNotch Talent Training Plan [CITTCD 201504080]
- Capacity Building for Science & Technology Innovation - Fundamental Scientific Research Funds [008/19530050170, 008/19530050180, 008/18530500186, 025185305000/142]
- Beijing Talents Project [2018A19]
- Scientific Research Base Development Program of the Beijing Municipal Commission of Education
Meta-hologram is a hologram constructed with metasurface which is composed of subwavelength optical antennas. Most of the meta-holograms are phase-only modulated. The phase distributions in these holograms are obtained by phase retrieval algorithm, which requires a lot of time and computing resources. Here, we design and demonstrate a meta-hologram with both phase and amplitude modulations for three-dimensional (3D) display by a simple method of inverse Fresnel-Kirchhoff integral in terahertz (THz) waveband. In this work, a meta-hologram with 8-level phase and 8-level amplitude modulations is realized by 64 subwavelength metallic C-shaped slot antennas. A THz holographic imaging system is utilized to detect the reconstructed images on different z planes along the direction of THz wave propagation. After the meta-hologram, three letters are clearly reconstructed in the preset positions. The meta-hologram with both phase and amplitude modulations can offer great potential applications in cartoon, virtual reality, and other applications bases on 3D figures display.
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