Researchers have developed an ultra-compact nanolaser that could fundamentally change how data is transmitted inside microchips—by replacing traditional electrical signals with light.

The concept of computers using light instead of electricity is becoming increasingly realistic, thanks to a breakthrough nanolaser created at the Technical University of Denmark (DTU). Reported in Science Advances, this device is so small that thousands could be integrated onto a single chip. Unlike electrical currents, which produce heat and limit performance, these nanolasers use photons to carry information, potentially delivering faster speeds while significantly lowering energy consumption in devices ranging from smartphones to large-scale data centers.

Figure 1. Nanolaser.

According to DTU professor Jesper Mørk, the innovation could lead to a new class of components that combine high performance with extremely small size. Such technology could enhance computing efficiency and enable advanced healthcare tools, including highly sensitive biosensors and high-resolution imaging systems. Figure 1 shows nanolaser.

Cutting Energy Use in Half

While fiber optic networks already use light to transmit data over long distances, computers still rely on electrical signals within their internal circuits. This leads to heat generation and limits efficiency. Embedding nanolasers directly into chips could address these issues, enabling faster communication with far less energy loss [1]. Mørk estimates that this approach could reduce computer energy consumption by up to 50%.

The DTU nanolaser is designed with this future in mind, as next-generation chips are expected to require thousands of compact, energy-efficient light sources for internal data transfer.

A Major Technological Leap

Built at DTU’s Nanolab facility, the device challenges previous assumptions about how small lasers can be made. It uses a nanocavity—a structure that traps and concentrates light into an incredibly tiny space once thought impossible to achieve.

When activated by a light beam, both photons and electrons are confined within this minute region, allowing the laser to function efficiently at room temperature with minimal energy input. The nanocavity design was originally developed by Professor Ole Sigmund’s research group at DTU Construct.

Future Impact: Faster Tech, Lower Emissions, Better Healthcare

One of the remaining challenges is enabling the nanolaser to operate using electrical power rather than an external light source. If researchers overcome this hurdle, the technology could have wide-reaching effects. Consumer electronics could become faster and more energy-efficient, data centers could significantly reduce electricity usage and carbon emissions, and healthcare could benefit from more precise diagnostic tools. Experts believe these technical challenges could be solved within the next 5 to 10 years, paving the way for a new era of light-powered computing.

References:

1. https://scitechdaily.com/scientists-create-tiny-nanolaser-that-could-revolutionize-future-computers/

Cite this article:

Keerthana S (2026), Tiny Nanolaser Breakthrough Could Transform the Future of Computing, AnaTechMaz, pp.451