Researchers have developed “metaholograms,” a new type of hologram that can project multiple high-fidelity images without crosstalk, potentially revolutionizing AR/VR displays and other technologies. These metaholograms, which offer higher resolution and wider viewing angles, use an innovative k-space translation design strategy and geometric phase encoding to eliminate inter-channel crosstalk and increase information capacity.
Metaholograms offer several advantages over traditional holograms, including broader operational bandwidth, higher imaging resolution, wider viewing angle, and more compact size. However, a major challenge for metaholograms has been their limited information capacity which only allows them to project a few independent images. Existing methods typically can provide a small number of display channels and often suffer from inter-channel crosstalk during image projections.
The device further incorporates a planar glass waveguide to convey incident light and leverages properties such as polarization and angle to switch the projection of up to six unique high-fidelity images without crosstalk.Additionally, the researchers have created a two-channel full-color metahologram and even an eighteen-channel metahologram using a combination of different multiplexing techniques.
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