Trapping light within metamaterial = ?

To explore new ways to control this fundamental force of nature, scientists from the City College of New York (CCNY) trapped light inside a magnetic metamaterial and made the material itself 10 times more magnetic in the process.

https://www.popularmechanics.com/science/a44843071/scientists-trapped-light-inside-metamaterial-magnetic/

Next up, magnetic lasers and lots and lots of more magnetic memory savings.

(Note that Popular Mechanics links the phrase “magneto-optical technologies” to an article claiming that the US has somehow managed to reverse-engineer alien technology from crashed UFOs…Um…OK…)