Nanolaser Could Halve Computer Energy Consumption

A newly developed nanolaser could allow microchips to communicate using light, potentially doubling speed and cutting energy use by half. Researchers at the Technical University of Denmark (DTU) created the ultra-small laser. This advancement could lead to more efficient computers, smartphones, and data centers.

Thousands of these nanolasers could be integrated onto a single microchip. This would allow information to be transmitted with photons, or particles of light, instead of electrical signals. Current computer chips use electricity, which generates heat and limits data transfer speeds.

Jesper Mørk, a DTU professor and co-author of the study, stated that the nanolaser enables a new generation of components. These components would combine high performance with minimal size. Beyond information technology, the technology could be used in healthcare for high-resolution imaging and ultra-sensitive biosensors.

The nanolaser was developed at DTU Nanolab. It pushes past the conventional size limits for lasers. The device uses a nanocavity to trap and concentrate light in a tiny space. This intense confinement was previously considered difficult to achieve.

When light shines on the device, both photons and electrons concentrate in the same microscopic area. This interaction allows the laser to operate at room temperature with low energy consumption. The light-trapping structure was initially developed by Professor Ole Sigmund's group at DTU Construct.

The next step for researchers is to make the nanolaser operate using electrical power. If successful, this technology could reduce energy consumption in data centers, offering climate benefits. Researchers estimate these technical challenges could be resolved within five to ten years.