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After decades of development, holography has become a mature optical technology for displaying information. However, traditional holographic techniques, which use only the wavelength and polarization of light as carriers of information, face certain limitations in terms of information security and capacity. Introducing a new optical dimension, orbital angular momentum (OAM), into holography offers an effective solution to these issues. Through theoretical analysis and simulations of holography with OAM, two-dimensional images are encrypted and stored. Then, a three-dimensional object is sliced into multiple two-dimensional images, which are stored in a phase array through OAM-multiplexing holography, effectively reducing the dimensionality of information storage. The OAM-multiplexing holography is successfully reproduced, thus enabling the realization of three-dimensional holography. In addition, each image is encrypted according to its corresponding topological charge, significantly enhancing the security of information transmission. This OAM-selective holography technology is more secure, offers greater information throughput, and has broad application potential.
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Keywords:
- Orbital Angular Momentum /
- Hologram /
- 3D Imaging
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