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Introducing Electrically Switchable Nanoantenna for Hologram Tech

Published Tue, Nov 23 2021 04:09 am
by The Silicon Trend

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Introducing Electrically Switchable Nanoantenna for Hologram Tech


Virtual Online Conferences

Once the pandemic paved its path onto our real-life world, everything started to revolutionize, with video conferencing kickstarted to numerous meetings and for more in the future. To experience real-life online conferences, 3D videos are required, yet the holographic tech is missing. The researchers at the University of Stuttgart, Germany, launched an electrically switchable plasmonic nanoantenna from conductive metallic polymers to understand the dynamic hologram displays, turning virtual meetings into real-life experiences.



Holographic Technology

Dynamic holograms that are switchable at video rates leveraging high-speed internet data are not yet possible, but another popular hologram feature is its 3D static images. The limiting factor of holographic pictures was the display resolution, as it requires 50K dpi, which is 100 times more than the top-notch smartphone displays. The pixel size must be minimized to half a micrometer for such a resolution, but liquid-crystal tech won't permit such miniature pixels.



Plasmonic Nanoantennas

Researchers have developed metasurfaces made of gold or aluminum that can't be switched to generate 3D static holograms for the past several years. Ph.D. Student - Julian Karst, nanophotonics expert - Dr. Mario Hentschel, and polymer chemist - Prof. Sabine Ludwigs and team found the electrically conducting polymers for switchable plasmonics.

In partnership with cleanroom head - Monika Ubl, Hentschel, and Karst created the nanostructure process using etching and electron beam lithography for plasmonic nanoantenna development, requiring a pixel density of over 50.000 dpi. In addition, Karst developed a simple hologram metasurface to divert an infrared laser beam 10-degrees onto one side by applying a voltage.

Presently, he is developing a hologram that acts as an optical lens, which can be turned on or off by the simple application of voltage. The polymer nanoantenna's optical properties must be changed into the visible wavelength range, requiring partnerships with material researchers and chemists. Along with visual displays, integrated or dynamic switchable followed by engineers and the 1st moving holograms can be mixed into AR or VR goggles and later onto TVs and smartphone screens.