Laser light switches on heat flow in ultra-thin structures

Researchers demonstrated the ability to induce a temperature difference exceeding 100 kelvin between stacked layers of two-dimensional (2D) materials using laser light on June 24, 2026. This breakthrough, published in Nature, highlights a novel method for controlling heat flow in ultra-thin structures. The experiment involved precisely directing laser pulses onto layered 2D materials, causing a significant thermal gradient to form across the stacked sheets. This precise control over heat transfer at the nanoscale opens new avenues for thermal management in advanced electronic devices and potentially in energy harvesting technologies. The study's findings suggest that laser-induced thermal gradients could be a powerful tool for manipulating heat in micro- and nano-scale systems, overcoming limitations of traditional heating and cooling methods. The ability to generate such a substantial temperature difference in such thin materials is a significant advancement in condensed matter physics and materials science, paving the way for future innovations in thermal engineering.