Nanolaser could cut computer energy use in half
New CapabilitiesDTU's topology-optimized nanolaser brings optical interconnects to the microprocessor
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Overview
Updated 1 hour agoA Danish research team has built a nanolaser small enough that thousands could fit on a single microchip. It traps light in a space far smaller than previous designs and runs at room temperature on very little energy.
Computers still move data inside chips as electrical current, which generates heat and slows performance. Replacing those links with light could reduce a computer's energy use by about half, the researchers estimate. The same shift could shrink power consumption at data centers and support new medical sensors.
Why it matters
If light replaces electricity inside microchips, computers and data centers could run faster while using roughly half today's power.
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Denmark's leading technical university and home of the nanolaser research team.
Open-access journal that published the DTU nanolaser findings in 2026.
Timeline
February 2026 September 2026
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ScienceDaily and tech outlets highlight the nanolaser
Today CoverageThe breakthrough reaches wider attention, with Mørk citing 5–10 years to practical electrical versions.
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DTU publishes nanolaser research in Science Advances
PublicationTeam reports a topology-optimized nanolaser, estimating computer energy use could drop by half.
Historical Context
3 moments from history that rhyme with this story — and how they unfolded.
First laser diodes (1962)
Robert Hall at General Electric and Nick Holonyak at GE demonstrated the first injection laser diodes at visible and infrared wavelengths. The devices shrank lasers from room-sized systems to semiconductor chips.
Semiconductor lasers entered products within years, powering optical discs, printers, and later fiber communications.
Every laser that powers today's internet descends from that miniaturization step.
The nanolaser continues the same arc of miniaturization, compressing the light source to dimensions fit for a single processor core.
Optical fiber replaces copper in telecom (1980s–2000s)
Long-distance telecommunications moved from electrical signals in copper cables to light pulses in glass fibers. Bandwidth rose by orders of magnitude, and the economics of carrying data across oceans and continents fundamentally shifted.
Telecom operators built out fiber backbones and submarine cables, enabling the early internet.
Light became the default transport medium for long-distance data, while electricity remained inside computers.
The DTU nanolaser aims to finish that electrical-to-optical transition, moving the last electrical links inside the chip onto light.
Intel's silicon photonics program (2000s–present)
Intel spent over a decade integrating photonics into silicon, overcoming material mismatches between lasers and silicon waveguides. The program eventually shipped optical transceivers for data centers, but dense on-chip optical links remained out of reach.
Silicon photonics reached the data-center interconnect market for rack-to-rack links.
The program showed both the promise and the difficulty of photonics on silicon: component count, alignment, and thermal management all proved hard to scale.
The nanolaser targets the same bottleneck Intel chased: tiny, efficient light sources tight enough to sit beside transistors.
