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Stretchable Hologram Has Future in Virtual Reality Applications

Scientists from the University of Pennsylvania have created holograms that can change from one image to another as the materials used to generate them are stretched - another step toward the sci-fi dream of sending and receiving holographic messages. The new method could have applications in virtual reality, flat displays, and optical communications. To make their holograms, the researchers turned to metasurfaces, which are flat, ultra-thin nanostructured surfaces. Previous studies had used these materials to create 3D and multi-color holograms. Using computational models and experiments, the research team calculated how much a holographic image expands as the material generating it stretches, and how far the image plane moves away from its original position. Based on these findings, they created multi-layered holograms made up of two or three different images. As the surface stretches, one image appears in the place of another. For example, a pentagon appears at 340 micrometers away from the film in its relaxed state. Pulling on the material by a certain amount makes a square appear, and stretching it even further replaces the square image with a triangle.

Topics:
Computers Displays/Monitors/HMIs Electronics & Computers Imaging Materials Optics Photonics

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    Transcript

    00:00:00 scientists have created new Holograms that can change from one image to another as the materials used to produce them are stretched to make their Holograms retes Agarwal and colleagues at the University of Pennsylvania turn to metasurfaces which are flat ultra thin nanostructured surfaces agarwal's team embeds gold nanorods in a stretchable film of polyethyl siloxane

    00:00:20 or pdms using computational models and experiments they calculated how much a holographic image expands as the material generating it stretches they also deter how far the image plane moves away from its original position based on these findings they created multi-layered Holograms made up of two or three different images as the surface stretches one image appears in the place

    00:00:41 of another for example when this film is in its relaxed State a pentagon appears at 340 microm away from the surface pulling on the material by a certain amount makes a square appear and stretching it even further replaces the square image with a triangle the method could have applications in virtual reality flat displays and Optical Communications the researchers reported

    00:01:03 their method in the ACs Journal nanoletters