Versatile meta-holographic screen including various images based upon seeing angle. Credit: POSTECH
POSTECH’s brand-new metasurface screen innovation jobs angle-dependent holograms, improving virtual and increased truth experiences.
The expression “flawless from every angle” is typically utilized to identify a star’s look. This does not merely indicate that they appear appealing from a particular perspective, however rather that their appeal stays constant and attractive from different angles and viewpoints. Recently, a research study group from Pohang University of Science and Technology (POSTECH) has actually used metasurface to produce angle-dependent holograms with several functions, catching considerable interest within the scholastic neighborhood.
Breakthrough in Display Technology by POSTECH
A research study group making up Professor Junsuk Rho from the Department of Mechanical Engineering and the Department of Chemical Engineering and PhD prospect Joohoon Kim from the Department of Mechanical Engineering at the POSTECH developed metasurface screen innovation. This innovation enables holograms to show several images based upon the observer’s seeing angle. The findings were just recently released in Nano Letters, a global journal concentrating on < period class ="glossaryLink" aria-describedby ="tt" data-cmtooltip ="<div class=glossaryItemTitle>nanoscale</div><div class=glossaryItemBody>The nanoscale refers to a length scale that is extremely small, typically on the order of nanometers (nm), which is one billionth of a meter. At this scale, materials and systems exhibit unique properties and behaviors that are different from those observed at larger length scales. The prefix "nano-" is derived from the Greek word "nanos," which means "dwarf" or "very small." Nanoscale phenomena are relevant to many fields, including materials science, chemistry, biology, and physics.</div>" data-gt-translate-attributes="[{"attribute":"data-cmtooltip", "format":"html"}]" tabindex =(******************************************* )function ="link" > nanoscale(******************** )research study and applications.
Objects can appear unique depending upon the audience’s position, an idea that can be utilized in holographic innovation to create cinematic and practical 3D holograms providing various images based upon the seeing angle.(******************************************************************************************************************* )the present obstacle depends on managing light dispersion according to the angle, making the application of nano-optics in this context a complex undertaking.
Metasurface: A Solution to Angle-Dependent Imaging
The group resolved this obstacle by leveraging metasurfaces, synthetic nanostructures efficient in specifically controling the attributes of light. These metasurfaces are extremely thin and light-weight, roughly one-hundredth the density of a human hair, making them assuring for applications in miniaturized display screens such as virtual and increased truth gadgets. Through making use of metasurfaces, the group designed a system that manages light to communicate just a particular stage of details at a provided angle, leading to varied images based upon the angle of occurrence.
In their experiments, the group’s metasurface created unique 3D holographic images at angles of both +35 ˚ and -35 ˚ for left-circular polarization. Remarkably, the group attained the production of various images for event light by utilizing a single metasurface, contingent on the particular polarization. Notably, the holographic screen showed a comprehensive seeing angle of 70 degrees ( ±35 degrees), allowing observers to view the three-dimensional hologram from different instructions.
Professor Junsuk Rho who led the research study described, “We have successfully achieved an effective display from diverse angles.” He included, “We anticipate this technology will make significant contributions to the commercialization of technology in virtual and augmented reality displays, encrypted imaging, information storage, and other applications.”
Reference: “Spin-Selective Angular Dispersion Control in Dielectric Metasurfaces for Multichannel Meta-Holographic Displays” by Sabiha Latif, Joohoon Kim, Hafiz Saad Khaliq, Nasir Mahmood, Muhammad Afnan Ansari, Xianzhong Chen, Jehan Akbar, Trevon Badloe, Muhammad Zubair, Yehia Massoud, Muhammad Qasim Mehmood and Junsuk Rho, 2 January 2024, Nano Letters
DOI: 10.1021/ acs.nanolett.3 c04064
The research study was performed with the assistance from the program of POSCO-POSTECH-RIST Convergence Research Center program, the STEAM Research Program of the National Research Foundation of Korea moneyed by the Ministry of Science and ICT, and the Alchemist fellowship of the Ministry of Trade, Industry and Energy.
