Light stopped dead in its tracks for 60 seconds

Scientists at the university of Darmstadt used a Praseodymium doped crystal of Yttrium Silicate to trap light for a whole minute. This may be a precursor of light memory for data storage.
So far this requires a cryogenic cooled system.

<a href="https://www.extremetech.com/extreme/162289-light-stopped-completely-for-a-minute-inside-a-crystal-the-basis-of-quantum-memory?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+ziffdavis%2Fextremetech+%28Extremetech%29" target="_blank" rel="nofollow noopener noreferrer">Light stopped completely for a minute inside a crystal: The basis of quantum memory | ExtremeTech</a>