The latest technology of holography

A new holography invented by scientists at Tel Aviv University in Israel may fully realize the functions of these devices. If you want to make a three-dimensional effect by using the existing technology, you must reproduce a two-dimensional image, that is, rotate or expand it. However, the nano-antenna technology of Tel Aviv University's innovation team allows the newly designed hologram to copy the depth of the pattern without image copying. Researchers believe that the application of this technology will be extremely extensive and diverse, and many commercial entities have expressed strong interest in it.

It is an interesting idea to study the parameters and phase of light. If we can dynamically change the relationship between light waves, we can create something that emits dynamically, just like holographic TV. The application of this technology will be unlimited. If we can get light and irradiate it with a specific nanostructure, we can project it in any direction, in any form you want. This will get interesting results.

After a year's research in the laboratory, scientists invented a small metal nano antenna chip and an adaptive holographic algorithm, which can detect the "phase diagram" of a beam of light waves. Phase is related to the propagation distance of light waves from the object you see to your eyes. In reality, our brains know how to understand phase information, so they can have a sense of depth. But when you look at a photo, you often lose this information, so the photo looks smooth. Holography retains this phase information, which is the basis of 3D imaging.

Researchers believe that compared with related technologies, their technology has successfully formed a high-resolution hologram for the first time, which can be projected from any direction. Professor Schell said, "We can use this technology to reflect anything we want. Previously, scientists could only make some basic shapes, such as circles and stripes. Using our method, we can get specially designed patterns, such as the logo of Tel Aviv University, and we can get the best results. "

This technology can also be applied to scientific research, safety, medicine, engineering and other fields as well as entertainment purposes. For example, surgeons must copy many scanned images to produce accurate pictures. However, he only needs to generate a hologram, so he can check the symptoms of the body from all angles. For another example, an architect can draw a holographic design, just like walking in. Its application is really endless. In addition, the new technology can also be applied to military purposes and anti-counterfeiting technology, such as improving the performance of lidar. At present, researchers are studying another new technology, which can make holograms change shape and motion.

This research was completed by the innovation team of Tel Aviv University, which was led by Professor Yael Hanen, director of the Center for Nanoscience and Nanotechnology of Tel Aviv University, Professor Jacob Schell and Professor Emelbaugh from the School of Electrical Engineering. Under the leadership and guidance of hanin and other scientists, yuval Ifeit, Michael Eitan and Zef Iruz, Ph.D. students of Tel Aviv University, invented an efficient self-portrait method by using nano-antenna technology. This technology uses the parameters of the light source itself to form a dynamic and complex holographic image. Scientists' research results were published in Nano Express, a publication of the American Chemical Society.