Researchers have found a new way to control tiny quantum light sources by twisting atomically thin layers of hexagonal boron nitride, according to Phys.org.
Hexagonal boron nitride is a crystal that can be peeled down to layers just one atom thick, much like the more famous material graphene. Phys.org reports that these layers can host quantum light sources — minuscule emitters capable of releasing light in precise, controllable amounts.
The twist, quite literally, is in the method. By rotating one atomic layer relative to another, the researchers describe a means of controlling how these light sources behave. Adjusting the angle between stacked sheets is an approach physicists have used to coax new electronic and optical properties out of two-dimensional materials, and Phys.org indicates the same lever can be applied to quantum light here.
The source item does not detail the specific performance figures, the research team, or where the work was published, so those particulars remain open.
Why it matters: reliable, controllable single-photon light sources are a foundational building block for quantum computing, ultra-secure communication, and advanced sensing — and a simple physical knob like twisting could make these sources easier to engineer and tune.