Displaying three-dimensional pictures that are visible to the unaided eye is best done with 3D holograms. Metasurfaces made of subwavelength structures have a lot of potential for manipulating the light field, which is beneficial for beating the limitations of conventional computer-generated holography.
However, issues like low frame rate and low frame number have long stood in the way of accomplishing dynamic meta-holography in the visible range. In this study, researchers present a meta-holography (3D hologram) design that can produce 228 different holographic frames at an incredibly fast frame rate (9523 frames per second) in the visible spectrum.
The construction is based on a high-speed dynamic structured laser beam modulation module and a space channel metasurface. High modulation effectiveness silicon nitride nanopillars make up the space channel. In addition to serving holographic displays, this technique can be applied to laser manufacturing, optical storage, optics communications, and data processing.
Metamaterials and metasurfaces have recently brought in a new era for hologram research and other research fields in engineering optics 2.0, thanks to the enormous advancement of nanofabrication technology. Metamaterials are made up of subwavelength artificial structures that go beyond the capabilities of bulk materials to carry out novel tasks. Because it is highly challenging to create 3D metamaterials, metasurfaces are important optical components in the visible spectrum.
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