Researchers have found a way to control quantum light by stacking and twisting layers of material only a single atom thick, according to Interesting Engineering.
The report describes how these ultra-thin sheets, when layered and rotated relative to one another, give scientists a handle on light at the quantum level — the regime where light behaves not as a steady beam but as individual particles with delicate, controllable properties.
The key ingredient is the twist. By adjusting the angle between atom-thin layers, the team is able to shape how the stacked material emits and manipulates quantum light, Interesting Engineering reports. That kind of tunable control is difficult to achieve, because quantum states are famously fragile and easily disturbed.
Why does a twist matter so much? In materials this thin, the relative angle between layers changes how electrons inside them behave, which in turn changes how the material interacts with light. Small mechanical adjustments can translate into large changes in quantum behavior.
The broader source item frames the work as a step toward more practical quantum technologies, where reliable sources of controllable quantum light are a foundational building block.
It matters because steady, tunable control over quantum light is one of the hardest problems standing between today's lab experiments and real-world quantum computing, sensing, and secure communication — and a method built from atom-thin layers points toward a compact, adjustable path forward.