Seonglae ChoLaser-induced plasma displays ionize air molecules to create glowing points of light
Femto-second LASER, which create a pulse duration so minuscule that it doesn't result in any appreciable skin damage unless fired at the same spot at one shot per millisecond for a duration of 2,000 milliseconds
Touching the plasma produces a physical sensation, as if the light has a physical substance.
Femtosecond Lasers Create 3-D Midair Plasma Displays You Can Touch
Floating dots of plasma make tiny, touchable images
https://spectrum.ieee.org/femtosecond-lasers-create-3d-midair-plasma-displays-you-can-touch
