During a recent demonstration at the Huntuo Joint Laser Laboratory in the Huhan optic valley, Chinese scientists, using a superpower laser, created symbols in the air that were visible at any angle and that could be touched by their hands.
Despite the unusual nature of the experiment, there's nothing magical about it; superb but very short laser pulses ionize atmospheric gas mixture molecules and turn them into plasma with the effect of candles. Another thing is to focus the laser in space with such precision is not a task from the lungs. Developers did not give clear instructions how to repeat such an experiment, but told us that 3D scanners were needed to bring the laser to the right points of space.
The duration of each laser pulse is several femtoseconds, with each pulse peaking at millions of megawatts of energy, but because the pulses are super short, the average laser input is just a few dozen watts.
" said Tsao Xiangdong, a leading scientist at the lab in an interview with Science and Technology Daily.
The scientist continued that improving the accuracy of laser management would allow the creation of full-colored and bright images in the air, while researchers hope to use development in other areas: precision production, human brain studies, quantum computers, and other advanced fields of science.