Sponsored Links

Light-emitting silicon overcomes a major obstacle to denser, faster chips

It's a solution 50 years in the making.
Machine used to grow silicon nanowires
Nando Harmsen, TU/e
Jon Fingas
Jon Fingas|@jonfingas|April 12, 2020 7:58 PM

The push for ever-smaller chips has been running into more and more obstacles, including the very limits of silicon — while optical connections would allow for denser, speedier processors by eliminating heat and energy issues, silicon is lousy at emitting light. Or rather, it was. Eindhoven University of Technology researchers have developed what they say is the first silicon alloy that can emit light. The breakthrough is a mix of silicon and germanium in a hexagonal structure that allows a band gap (and thus emitting light).

Scientists have been pursuing this for about 50 years, the university said, and a team created hexagonal silicon back in 2015. However, they couldn’t get the result to emit light until now, when they reduced the number of impurities and defects.

The team still needs to produce a laser before they have technology that could be used in chips, and there would still be plenty of refinement left before you would see this in shipping electronics. That laser is expected in 2020, though. And this latest development was arguably the largest hurdle. From now on, the main challenge is making the technology practical.

All products recommended by Engadget are selected by our editorial team, independent of our parent company. Some of our stories include affiliate links. If you buy something through one of these links, we may earn an affiliate commission. All prices are correct at the time of publishing.
Light-emitting silicon overcomes a major obstacle to denser, faster chips