Scientists have discovered a new way to control quantum light sources by twisting atomically thin layers of a material known as hexagonal boron nitride (hBN), a breakthrough that could help bring quantum technologies closer to practical use.

Researchers from the University of Technology Sydney found that rotating and restacking layers of hBN can significantly alter the color and wavelength of light emitted by quantum emitters embedded within the material.

Quantum emitters are tiny light sources that can produce single photons, making them important building blocks for future quantum computers, secure communication networks, and highly sensitive sensors. While scientists have been able to detect and study these emitters, controlling them has remained a major challenge.

The team says its approach offers a new way to tune these light sources by exploiting the unique layered structure of hBN, a material that can be repeatedly separated, twisted, and reassembled.

Twisting light into control

Lead author Dr. Angus Gale said the findings provide researchers with a new tool for manipulating quantum emitters.

“You can measure these quantum emitters and see that they exist, but it’s hard to make them work in practice. This gives us a lever to get closer to that – a step towards the realisation of quantum technologies,” said Dr Gale.

In experiments, the researchers were able to produce a significant shift in the emitted light by changing the twist angle between layers. Unlike many studies where materials are assembled once and left unchanged, the team repeatedly picked up, twisted, and restacked the layers while continuing to modify the optical properties.

“We’re leveraging the fact that this material, hexagonal boron nitride (hBN), is layered. We can pick it up, stack it, twist it, and use that twist to modify the emitters. You can’t really do that with traditional materials like diamond or silicon carbide.”

According to the researchers, the amount of tuning achieved was larger than expected and exceeded what is typically possible in many other quantum emitter platforms.

“The benefit is that we used this twistable platform to shift the emission by a very significant amount,” said Gale. “Often when you control these systems, the amount of manipulation is very limited, but in this case the shift was much larger than expected.”

New path for quantum

Rather than forcing hBN to behave like more conventional quantum materials, the team focused on taking advantage of its natural properties.

“Rather than trying to make hBN defects behave like a traditional solid-state hosts, we took advantage of hBN’s own strength: its thin, layered, twistable structure.”

Gale compared the material to slices of cheese rather than a solid block.

“With a block of cheese, you can’t really get to the flavour in the middle. But with slices, you can peel away layers, put them back together and change how they interact,” he said.

Professor Igor Aharonovich said twisting layered materials can produce entirely new physical behaviors.

“You can take two layers that don’t do much on their own, put them together at a specific angle, and suddenly you have a completely different system,” said Professor Aharonovich.

The researchers believe the approach could eventually contribute to the development of quantum computing, quantum communication, and quantum sensing technologies used in fields ranging from healthcare to cybersecurity and navigation.

The study was published in Advanced Materials.

Sensory Robotics has received safety certification for a system designed to let industrial robots operate alongside people without the protective cages commonly used on factory floors. The certification clears the way for deployment of the company’s SR-1 technology in regulated manufacturing environments across the United States and Canada.

The SR-1 system combines 3D vision technology, sensors, and real-time safety software that continuously monitors the area around robotic arms. Instead of relying on physical barriers, the system creates virtual safety zones that adjust based on human movement and machine activity.

The company says the technology can be installed on existing industrial robotic production cells, potentially allowing manufacturers to retrofit current equipment rather than replace it. The goal is to enable human workers and high-speed industrial robots to share the same workspace safely.

The certification includes cULus 1740 and ISO 13849 Performance Level d validation, standards widely recognized in industrial automation and machine safety. The approvals mark the transition of the technology from development and testing into commercial deployment.

Invisible safety zones emerge

“Without this safety certification, our technology doesn’t leave the lab, and it doesn’t reach the factory floor,” Sensory Robotics CEO Chris Edwards says. “Now, it can.”

Industrial robots have long been separated from workers by fences and cages because of the speed and force at which they operate. While collaborative robots have been designed to work closer to humans, many traditional robotic systems still require physical barriers to meet safety requirements.

Sensory Robotics says SR-1 addresses that challenge by continuously tracking people near robotic cells and adjusting robot behavior in real time.

“We designed SR-1 to continuously see people and adjust robot movements in real time,” Edwards says. “This UL certification now allows our technology to be purchased and installed on industrial robots, enabling them to safely operate alongside humans without physical barriers.”

According to the company, the certification process evaluated how the system responds to equipment failures, safety-function disruptions, and potential risks to workers. Such certifications are often required before technologies can be introduced into regulated manufacturing facilities.

Factory robots lose fences

The company argues that eliminating physical cages could free up factory floor space, improve workflow flexibility, and reduce production interruptions. Traditional robotic work cells often require complete shutdowns when workers enter restricted areas, creating downtime that can accumulate across large manufacturing operations.

“The goal is simple,” says chief operating officer Mark Gagas. “Keep people safe without stopping production every time someone enters a workspace. In traditional environments, a safety interruption can require a full robot shutdown and restart, sometimes taking up to 10 minutes per incident. Add that up across a production line, and those delays compound into high operational costs.”

The company says its system is already attracting interest from sectors including automotive, aerospace, logistics, manufacturing, and defense. Sensory Robotics also received a $1.25 million Department of Defense SBIR Phase II grant and additional support through the University of Cincinnati’s innovation ecosystem.

“These combined certifications are the key that unlocks real-world industrial adoption and approval for companies to purchase fenceless human-robot collaboration systems like SR-1,” Gagas says. “It means regulated manufacturing environments can now trust and deploy this technology into their robots with confidence.”