Scientists at DTU have created a nanolaser designed to advance optical communication within microchips, potentially transforming how computers, smartphones, and data centers process information. The research was published in Science Advances and represents progress toward integrating thousands of these devices onto single chips. Currently, data travels through computer circuits via electrical signals, which generates heat and limits transfer speeds. The development aims to replace this approach by enabling photons to carry information across chips with minimal energy loss.
The nanolaser operates through a nanocavity structure that concentrates light and electrons in an extremely small space at room temperature. This breakthrough surpasses previous size limitations for laser technology. When light is directed onto the device, the intense interaction between photons and electrons enables laser function with unusually low energy requirements. The light-trapping structure underlying the technology originated from research by Professor Ole Sigmund’s group at DTU Construct. DTU professor Jesper Mørk, who co-authored the study with Drs. Meng Xiong and Yi Yu, estimates that nanolasers integrated into computers could reduce overall energy consumption by approximately half.
The internet already uses fiber optic cables to transmit data via light, but computers have continued relying on electrical circuits internally. Implementing optical communication directly on microchips would allow information transfer with minimal energy loss, potentially enabling devices to operate faster while generating less heat. The technology could benefit multiple sectors, including healthcare applications where the nanolaser’s light concentration capability supports high-resolution imaging and sensitive biosensors.
Researchers acknowledge that the primary remaining obstacle involves powering the nanolaser with electrical current rather than optical input. Technical experts estimate this challenge could be resolved within the next 5-10 years. Success would open possibilities for substantial performance improvements in computing devices alongside decreased electricity consumption in data centers, which currently require enormous amounts of power.
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