20 September 2024 | Di Wang, Yi-Long Li, Xin-Ru Zheng, Ruo-Nan Ji, Xin Xie, Kun Song, Fan-Chuan Lin, Nan-Nan Li, Zhao Jiang, Chao Liu, Yi-Wei Zheng, Shao-Wei Wang, Wei Lu, Bao-Hua Jia & Qiong-Hua Wang
This article presents a novel 3D meta-holography technique that enables large-depth and polarization-controlled 3D holographic reconstruction. The method is based on angular spectrum diffraction theory, which allows for a depth reconstruction of 0.95 dm (95 mm), a significant improvement over previous methods that were limited to a maximum depth of 2 mm. The key innovation is the use of a metasurface with independent polarization control to create a polarization multiplexing 3D meta-hologram. The fabricated amorphous silicon metasurface increases the depth range by 47.5 times, enabling the reconstruction of 3D images with different colors and polarization states in the visible spectrum. This technique offers new possibilities for data storage, display, information security, and virtual reality applications.
The metasurface is designed to control the phase of light using geometric phase control, with each unit cell independently modulating the phase of the light field. The metasurface is fabricated using nanofabrication techniques, and the resulting structure is capable of generating high-quality 3D images with a large depth and polarization control. The method also allows for color meta-holography, where different wavelengths of light can be used to produce images with varying colors. The technique is validated through experimental results, demonstrating the ability to reconstruct 3D images at depths of up to 70 mm with high quality and minimal distortion.
The proposed method overcomes the limitations of traditional 3D holography, which is constrained by the focal length of a Fourier lens and the diffraction crosstalk. By using angular spectrum diffraction theory, the method enables the reconstruction of 3D images with a large depth and high resolution. The metasurface is designed to minimize speckle noise and optimize the phase information for high-quality reconstruction. The technique also allows for the simultaneous control of polarization states, enabling the reconstruction of different 3D images with varying polarization states. This capability significantly increases the spatial information capacity of the holographic system, making it suitable for applications such as encryption, structured light modulation, and data storage. The results demonstrate the potential of this method for wide-viewing-angle naked-eye 3D display and other advanced applications.This article presents a novel 3D meta-holography technique that enables large-depth and polarization-controlled 3D holographic reconstruction. The method is based on angular spectrum diffraction theory, which allows for a depth reconstruction of 0.95 dm (95 mm), a significant improvement over previous methods that were limited to a maximum depth of 2 mm. The key innovation is the use of a metasurface with independent polarization control to create a polarization multiplexing 3D meta-hologram. The fabricated amorphous silicon metasurface increases the depth range by 47.5 times, enabling the reconstruction of 3D images with different colors and polarization states in the visible spectrum. This technique offers new possibilities for data storage, display, information security, and virtual reality applications.
The metasurface is designed to control the phase of light using geometric phase control, with each unit cell independently modulating the phase of the light field. The metasurface is fabricated using nanofabrication techniques, and the resulting structure is capable of generating high-quality 3D images with a large depth and polarization control. The method also allows for color meta-holography, where different wavelengths of light can be used to produce images with varying colors. The technique is validated through experimental results, demonstrating the ability to reconstruct 3D images at depths of up to 70 mm with high quality and minimal distortion.
The proposed method overcomes the limitations of traditional 3D holography, which is constrained by the focal length of a Fourier lens and the diffraction crosstalk. By using angular spectrum diffraction theory, the method enables the reconstruction of 3D images with a large depth and high resolution. The metasurface is designed to minimize speckle noise and optimize the phase information for high-quality reconstruction. The technique also allows for the simultaneous control of polarization states, enabling the reconstruction of different 3D images with varying polarization states. This capability significantly increases the spatial information capacity of the holographic system, making it suitable for applications such as encryption, structured light modulation, and data storage. The results demonstrate the potential of this method for wide-viewing-angle naked-eye 3D display and other advanced applications.