Researchers realize world's thinnest optical hologram with 2-D material monolayer

phys.org | 10/13/2016 | Staff
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Missouri S&T researchers are demonstrating a new concept to reconstruct holographic images by using a single two-dimensional material monolayer with the thickness of less than one nanometer. Their work could lead to the creation of smart watches with holographic displays, printed security cryptograms on bank notes and credit cards, and new possibilities for data storage.

The researchers describe their atomically thin nonlinear optical holograms in Nano Letters, one of the top journals in nanotechnology research, and prototype their device by reconstructing several kinds of holographic images with tungsten disulfide monolayers of the thickness of around 0.7 nanometer. A nanometer is one billionth of a meter, and a tungsten disulfide monolayer only contains one layer of tungsten atoms sandwiched between two layers of sulfur atoms.

Approach - Nano - Letters - Paper - Transition

The approach is described in the Nano Letters paper "Atomically thin nonlinear transition metal dichalcogenide holograms," which was published online Friday, Aug. 16. It involves the use of only a single nanopatterned tungsten disulfide monolayer that is able to control the wavefront of light, where the designed hologram patterns are punctured by a nanofabrication process known as focused ion beam milling.

Experimenting with the ultrafast laser excitation on the nanopatterned tungsten disulfide monolayer, the researchers demonstrated a nonlinear optical hologram with high...
(Excerpt) Read more at: phys.org
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