Shanghai research team develops ultra-broadband optical holographic technology

Imagine a scenario where when you and your friends receive the same encrypted holographic data, using different “light keys” to decode, your eyes are presented by Zhou Jielun singing “Say good not to cry”, friends present is Yi Qiqi in hip-hop. The orbital angular momentum holographic technology developed by the team of Gu Min academicians at Shanghai Polytechnic University may make such a cool scene a reality.

Shanghai research team develops ultra-broadband optical holographic technology

Recently, the scientific research team led by the Foreign Academician of the Chinese Academy of Engineering, the Academician of the Australian Academy of Sciences and Engineering, the Australian Academy of Technical Sciences and Engineering, the Winner of the International Optical Dennis Gabor Award, and Professor Gu Min of the Artificial Intelligence Nanophotonics Research Center of Shanghai Polytechnic University, creatively used the “spiral” As an information carrier in the optical holographic process, the dynamic beam of the orbital angle not only subverts the transmission mode of holographic image, but also sets up the protection barrier of “information security” for the transmission process, realizes the world’s first ultra-wide-band optical holographic process, and provides large-capacity holographic surgery for the big data information age.

Shanghai research team develops ultra-broadband optical holographic technology

On December 10, Beijing time, the results of the study were published in a long-form form in the world’s leading optical journal, Nature-Photonics. Gu Min is the author of the paper newsletter, Dr. Fang Xinyuan, a special researcher at the School of Optoelectronics Information and Computer Engineering, is the first author. This is also the only long article published by Chinese researchers in the field of holographic information security technology published in recent years.

Shanghai research team develops ultra-broadband optical holographic technology

For traditional holographic display technology, a plan holograms can often record only one picture, but with the rapid development of the information age, more pictures need to be recorded using the same memory. Using the newly discovered orbital angular momentum holographic technology, the same memory can increase the image information storage capacity by 100 times, laying the foundation for the next generation of high-capacity holographic technology.

Fang Xinyuan said that in the traditional holographic display technology, only by increasing the number of information channels by increasing the signal source to achieve complex display effect, often “insufficient bandwidth” “low resolution” and so on. In the study, it is found that the dynamic light of different orbital angles of “helix degree” corresponds to different information channels of the same signal source, combined with nanophotonics, the holographic display effect of ultra-wideband can be achieved by using only one nano-scale signal source. “This provides the public with better information recording and a great visual experience.” “

In Gu Min’s view, this is only one of the advantages of this technology, its “hard power” also lies in the creative installation of holographic technology a security “lock.” “Traditionally, a holographic ‘lock’ is only a decoding method, and our research pairs ‘spiral light’ with multiple ‘keys’, which can be decoded out of different information by the same holographic ‘lock’, and the recipient interprets the final information that only he can see according to the ‘light key’ in his hand, which protects the security of information transmission.” Gu Min said.

Referring to the future application of this technology, Gu Min said that orbital angular momentum holographic technology in artificial intelligence, three-dimensional display, digital holographic microscopy, data storage, artificial neural networks and other fields will have great potential, in addition, it can also be applied in the field of quantum optics, for the information interaction process to provide unprecedented security.

“We look forward to applying this work to holographic displays over the next three years. Gu Min admitted that, in fact, this is difficult, the need for industry and research from all walks of life to work together.

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