How researchers made a Mona Lisa hologram
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Holograms are often displayed in science fiction as colorful, life-sized projections. And now that technology of the future is doable today and it has been used to recreate the Mona Lisa as a hologram.
In Applied Physics Reviews, researchers developed an acoustic metasurface-based holography technique that uses a deep learning algorithm to generate and iteratively improve a hologram of the Mona Lisa.
The researchers were from Tianjin University, the Beijing Institute of Technology, Rowan University, the University of Missouri, Qingdao University, Shijiazhuang Tiedao University and Beijing Jiaotong University.
Holograms are images created by recording and reconstructing the interference pattern of light or sound waves. They provide realistic and immersive visual or auditory experiences and can be applied in entertainment, medical imaging, and communication, among other fields.
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Metasurfaces, or two-dimensional materials made of an array of tiny antenna-like components, can help a lot with the holography process.
“A metasurface-based hologram works by precisely controlling the phase and amplitude of the waves interacting with the metasurface,” said author Yue-Sheng Wang, in a statement. “As a result, the outgoing waves at each pixel exhibit a certain amplitude and phase, which results in the desired holographic image based on their interference.”
The team wanted to develop a metasurface holography optimization method to
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