Skip to Content
Uncategorized

GaAs Powered

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.

Keep Reading

Most Popular

Death and Jeff Bezos
Death and Jeff Bezos

Meet Altos Labs, Silicon Valley’s latest wild bet on living forever

Funders of a deep-pocketed new "rejuvenation" startup are said to include Jeff Bezos and Yuri Milner.

tonga eruption
tonga eruption

Tonga’s volcano blast cut it off from the world. Here’s what it will take to get it reconnected.

The world is anxiously awaiting news from the island—but on top of the physical destruction, the eruption has disconnected it from the internet.

mouse engineered to grow human hair
mouse engineered to grow human hair

Going bald? Lab-grown hair cells could be on the way

These biotech companies are reprogramming cells to treat baldness, but it’s still early days.

conceptual illustration showing various women's faces being scanned
conceptual illustration showing various women's faces being scanned

A horrifying new AI app swaps women into porn videos with a click

Deepfake researchers have long feared the day this would arrive.

Stay connected

Illustration by Rose WongIllustration by Rose Wong

Get the latest updates from
MIT Technology Review

Discover special offers, top stories, upcoming events, and more.

Thank you for submitting your email!

Explore more newsletters

It looks like something went wrong.

We’re having trouble saving your preferences. Try refreshing this page and updating them one more time. If you continue to get this message, reach out to us at customer-service@technologyreview.com with a list of newsletters you’d like to receive.