Laser light can cool down high performance processors. It can also make things hot for viruses and bacteria…
A US startup’s new photonic chip, measuring the size of a 1 cent coin, can render pathogens inactive with the help of far-UVC light. By using the so-called ‘Second Harmonics’ effect.
When blue laser light with a 445 nm wavelength is shone on aluminium nitrate ceramic crystals its frequency is increased and the wavelength halved.
At 222 nm wavelength, the far-UVC no longer damages human skin – contrary to UV-A or UV-B rays (sun protection!)
Like LEDs, the chips could be deployed in public lights; and could even extend groceries’ shelf life.
Also recommended against pathogens: chewing gum made from hyacinth beans.
