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Laser light switches on heat flow in ultra-thin structures

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Researchers have demonstrated that laser light irradiation can induce a temperature difference exceeding 100 kelvin between stacked layers of two-dimensional materials. This optical control mechanism allows for the manipulation of heat flow in ultra-thin material structures. The technique represents a novel approach to thermal management at the nanoscale using light as an external stimulus.


This discovery could enable new thermal switching devices and improve heat management in miniaturized electronics and quantum computing systems. The ability to optically control temperature gradients in 2D materials may lead to more efficient thermal interfaces and novel thermoelectric applications.


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Nature, Published online: 24 June 2026; doi:10.1038/d41586-026-01803-2

A temperature difference of more than 100 kelvin can be created between stacked layers of 2D material by irradiating them with laser light.

Source: Laser light switches on heat flow in ultra-thin structures