A third filament was aligned to couple nonlinearly with the plasma gratings in the same plane (vertical to the fluid jet).

Source: https://phys.org/news/2023-01-spectroscopy-technique-element-liquid.html

There are also many applications for this technology in AR devices that already utilize diffraction gratings as a key component.

Source: https://phys.org/news/2023-08-3d-technology-precision.html

The researchers have not yet tested the durability of the chitosan gratings but say that they would be appropriate for disposable spectrometers used for fieldwork.

Source: https://phys.org/news/2023-03-biodegradable-optical-components-crab-shells.html

These gratings serve as waveguides and direct light from the fiber to the meta-optics chip which shapes and outputs light to free space, parallel to the input light.

Source: https://phys.org/news/2023-05-multifunctional-interface-enables-free-space.html