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TechQuiet 13d · day 13

University researchers set world record for fast, efficient data center LED

A gallium nitride micro-LED achieves 2.75 GHz switching speed while consuming just 25 milliwatts, offering a lower-power alternative to lasers for short-range data center links.

newest coverage 12d agosummary written 10d ago6 pieces RedditGoogle News

What to know

  • Researchers achieved a world record for LED switching speed (2.75 GHz) at ultra-low power (25 mW), with optimal performance at a 5-micrometer device size.
  • The micro-LED could replace power-hungry lasers for the majority of data center communications, which occur over short distances under 10 meters.
  • The systematic scaling study provides a development roadmap for balancing device size, bandwidth, and power consumption—contradicting the assumption that smaller designs always perform better.

Abdelghany Abouelnagga Lead researcher, Illinois Grainger Engineering graduate studentCan Bayram Illinois Grainger Engineering electrical and computer engineering professorPeter Dragic Illinois Grainger Engineering electrical and computer engineering professorMilton Feng Illinois Grainger Engineering electrical and computer engineering professorPatrick Fay Notre Dame electrical engineering professor

University researchers set world record for fast, efficient data center LED
eurekalert.org

How it unfolded 2 developments, newest first · click a bar or a number to jump articlesposts

Peak 4 pieces in 3h at Oct 31, 5 AM; 6 pieces over 13 days (4 articles · 2 posts) Oct 31, 5 AM — 4 pieces · 4 articles — Google News 4Oct 31, 8 AM — 2 pieces · 2 posts — Reddit 2Oct 31, 11 AM — quietOct 31, 2 PM — quietOct 31, 5 PM — quietOct 31, 8 PM — quietOct 31, 11 PM — quietNov 1, 1 AM — quietNov 1, 4 AM — quietNov 1, 7 AM — quietNov 1, 10 AM — quietNov 1, 1 PM — quietNov 1, 4 PM — quietNov 1, 7 PM — quietNov 1, 10 PM — quietNov 2, 1 AM — quietNov 2, 4 AM — quietNov 2, 7 AM — quietNov 2, 10 AM — quietNov 2, 1 PM — quietNov 2, 4 PM — quietNov 2, 7 PM — quietNov 2, 10 PM — quietNov 3, 1 AM — quietNov 3, 4 AM — quietNov 3, 7 AM — quietNov 3, 10 AM — quietNov 3, 1 PM — quietNov 3, 4 PM — quietNov 3, 7 PM — quietNov 3, 10 PM — quietNov 4, 1 AM — quietNov 4, 4 AM — quietNov 4, 7 AM — quietNov 4, 10 AM — quietNov 4, 1 PM — quietNov 4, 4 PM — quietNov 4, 7 PM — quietNov 4, 10 PM — quietNov 5, 1 AM — quietNov 5, 4 AM — quietNov 5, 7 AM — quietNov 5, 10 AM — quietNov 5, 1 PM — quietNov 5, 4 PM — quietNov 5, 7 PM — quietNov 5, 10 PM — quietNov 6, 1 AM — quietNov 6, 4 AM — quietNov 6, 7 AM — quietNov 6, 10 AM — quietNov 6, 1 PM — quietNov 6, 4 PM — quietNov 6, 7 PM — quietNov 6, 10 PM — quietNov 7, 1 AM — quietNov 7, 4 AM — quietNov 7, 7 AM — quietNov 7, 10 AM — quietNov 7, 1 PM — quietNov 7, 4 PM — quietNov 7, 7 PM — quietNov 7, 10 PM — quietNov 8, 1 AM — quietNov 8, 4 AM — quietNov 8, 7 AM — quietNov 8, 10 AM — quietNov 8, 1 PM — quietNov 8, 4 PM — quietNov 8, 7 PM — quietNov 8, 10 PM — quietNov 9, 1 AM — quietNov 9, 4 AM — quietNov 9, 7 AM — quietNov 9, 10 AM — quietNov 9, 1 PM — quietNov 9, 4 PM — quietNov 9, 7 PM — quietNov 9, 10 PM — quietNov 10, 1 AM — quietNov 10, 4 AM — quietNov 10, 7 AM — quietNov 10, 10 AM — quietNov 10, 1 PM — quietNov 10, 4 PM — quietNov 10, 7 PM — quietNov 10, 10 PM — quietYesterday, 1 AM — quietYesterday, 4 AM — quietYesterday, 7 AM — quietYesterday, 10 AM — quietYesterday, 1 PM — quietYesterday, 4 PM — quietYesterday, 7 PM — quietYesterday, 10 PM — quietToday, 1 AM — quietToday, 4 AM — quietToday, 7 AM — quietToday, 10 AM — quietToday, 1 PM — quietToday, 4 PM — quietToday, 7 PM — quiet 1–2
Nov 1Nov 2Nov 3Nov 4Nov 5Nov 6Nov 7Nov 8Nov 9Nov 10yesterdaynow · 8:25 PM ET
  1. 2

    Researchers demonstrate optimal micro-LED size at 5 micrometers through systematic scaling study

    The team systematically scaled down micro-LED devices from 100 micrometers to 2 micrometers in diameter, discovering that the optimal performance point was at 5 micrometers—contradicting assumptions that smaller is always better. This scaling work provides a development roadmap for balancing size, bandwidth, and power consumption tradeoffs.

    “We found that, contrary to popular belief, smaller is not always better. Our work gives a development roadmap to systematically study the tradeoffs between size, bandwidth and power consumption.”
    — Abdelghany Abouelnagga
  2. 1

    University of Illinois and Notre Dame researchers set LED switching speed record

    A collaboration between the University of Illinois Urbana-Champaign's Grainger College of Engineering and Notre Dame achieved a world record for optical switching speed in quantum well LEDs, with a gallium nitride micro-LED device operating at 2.75 gigahertz optical modulation bandwidth while consuming 25 milliwatts of power. The findings were published in IEEE Electron Device Letters.

    “Ninety percent of communications in data centers is short range, meaning less than 10 meters. If we want to manage energy use in data centers, we need to consider lower-power optical communications such as LEDs.”
    — Abdelghany Abouelnagga

Also covered reported alongside — the timeline has no entry for these yet

  1. 2 outlets Record-fast micro-LED could reduce data center communication power

    first by Nanowerk, 12d ago · also EurekAlert!

    1 more headline

and 2 smaller pieces