Research at Lucent Technologies’ Bell Lab-oratories in Murray Hill, N. J., may be hastening the onset of a new era in electronic materials. Scientists have long known that electrons travel much faster in gallium arsenide (GaAs) than in silicon. But GaAs has found limited use in computing devices, partly because of the difficulty of fabricating suitable transistors.
Silicon chips use metal-oxide-semiconductor field-effect transistors, or MOSFETs. Most GaAs devices now in use (principally in wireless communications) are MESFETs, lacking the oxide. To tap the advantages of GaAs fully will require MOSFETs, which use less power. Bell Labs took the first step two years ago, but its prototypes were woefully inadequate-current fluctuated by 20 percent over a few hours. In the new GaAs devices, however, current drifts only about 1.5 percent after 200 hours. One key benefit: longer time between cell phone rechargings.
DeepMind’s cofounder: Generative AI is just a phase. What’s next is interactive AI.
“This is a profound moment in the history of technology,” says Mustafa Suleyman.
What to know about this autumn’s covid vaccines
New variants will pose a challenge, but early signs suggest the shots will still boost antibody responses.
Human-plus-AI solutions mitigate security threats
With the right human oversight, emerging technologies like artificial intelligence can help keep business and customer data secure
Next slide, please: A brief history of the corporate presentation
From million-dollar slide shows to Steve Jobs’s introduction of the iPhone, a bit of show business never hurt plain old business.
Get the latest updates from
MIT Technology Review
Discover special offers, top stories, upcoming events, and more.