Researchers design holographic lenses based on plasma

https://phys.org/news/2022-03-holographic-lenses-based-plasma.html

"constructive and destructive interference of light produces a high-intensity focal spot after the lens... pasma is created and modified by the interference between a pair of weaker pump lasers... resilient to imperfections in plasma density; plasma is difficult to control... based on two collinear pump lasers, with different foci overlapping in a gas jet... can tolerate very high light intensities, a thousand to a million times higher"