Smartphones will soon have 3D holograms, Korean scientists developed new technology that will make this possible

Until now, 3D holograms have been based on the method of phase holography using large and specialized cameras with polarizing filter. Korean scientists have developed technology that can create holograms on mobile devices, such as smartphones.

The Korean Institute of Science and Technology (KIST) announced that a scientific team led by Dr. Min-Chul Park, successfully developed a photodiode, which detects the polarization of light in the light spectrum next to the infrared spectrum and without the use of additional polarizing filters.

In this way, they made a miniature sensor for holographic images, for 3D holograms, using 2D semiconductor materials – rhenium diesel and tungsten diesel.

Photodiodes convert light into electrical signals and they are key components in the pixels of the image sensor in digital cameras and smartphone cameras. Mentioning the ability to sense the polarization of light in the ordinary camera image sensor provides a variety of new information and thus enables 3D storage holograms.

Previous polarization sensor cameras have an additional polarization filter measuring several hundred micrometers. Therefore, they can not be installed in portable electronic devices, because they can not be further reduced.

Korean scientists have developed a new photodiode for assembling layers of a n-type semiconductor layer, rhenium dieselneid, which demonstrates the difference in light absorption depending on the linear angle of polarization of light in the part of the light spectrum that is close to the infrared p-type semiconductor, tungsten dieselneide, which shows no difference in photo response depending on polarization, but provides superior performance.

The device proved to be excellent in the photo-detection of different waves of light, from ultraviolet, close to the infrared spectrum. It is even capable of detecting polarizing properties of light near the infrared spectrum.

Korean scientists have used a device to create a digital holographic image sensor, which records polarization characteristics, in order to successfully record holograms.

Research in reduction and integration with individual elements, it is finally necessary to reduce holographic systems. The result of our research will lay the foundation for the future development of miniature modules for holographic camera sensors, says Dr. Do Hwang Kyung.

Dr. Park adds that this new sensor could also open up new possibilities such as 3D night optics in the field of autonomous driving and biotechnology.

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