The November 2022 issue of IEEE Spectrum is here!

Close bar

Belgian Researchers Demonstrate Both Attractive and Repulsive Nanophotonic Forces

In what is being described as an experiment of fundamental scientific importance, optical signal processing in telecommunications could be impacted

1 min read

Joint research at the University of Ghent and the nanoelectronics research center IMEC have developed waveguides that when laser is passed through them generate both attracting and repulsing optical forces upon them.

According to the early announcement of the research, which eventually will be published in the August issue of Nature Nanotechnology, the demonstration of the repulsive force is a first and constitutes a matter of “fundamental scientific importance.”

The applications for this research will be in high-speed telecommunications where the technology could be an option for all-optical signal processing functions on a chip.

The Conversation (0)

3D-Stacked CMOS Takes Moore’s Law to New Heights

When transistors can’t get any smaller, the only direction is up

10 min read
An image of stacked squares with yellow flat bars through them.
Emily Cooper
Green

Perhaps the most far-reaching technological achievement over the last 50 years has been the steady march toward ever smaller transistors, fitting them more tightly together, and reducing their power consumption. And yet, ever since the two of us started our careers at Intel more than 20 years ago, we’ve been hearing the alarms that the descent into the infinitesimal was about to end. Yet year after year, brilliant new innovations continue to propel the semiconductor industry further.

Along this journey, we engineers had to change the transistor’s architecture as we continued to scale down area and power consumption while boosting performance. The “planar” transistor designs that took us through the last half of the 20th century gave way to 3D fin-shaped devices by the first half of the 2010s. Now, these too have an end date in sight, with a new gate-all-around (GAA) structure rolling into production soon. But we have to look even further ahead because our ability to scale down even this new transistor architecture, which we call RibbonFET, has its limits.

Keep Reading ↓Show less
{"imageShortcodeIds":[]}