University of Calgary Researchers Unlock New Quantum Potential in Diamonds

Researchers at the University of Calgary have made a groundbreaking discovery that expands the potential applications of diamonds in quantum technology. In early December 2025, the team from the Quantum Nanophotonics Lab published a paper detailing how they demonstrated second-harmonic generation in diamonds. This phenomenon involves converting one color of light to another by altering the frequency and wavelength of light waves, a feat previously thought impossible due to the symmetrical crystalline structure of diamonds.

In an interview, Dr. Paul Barclay, a professor in the university’s Department of Physics and Astronomy and the lab’s lead researcher, commented on the significance of their findings. “Diamond is not traditionally a material that would be compatible with the effects we’re seeing in our paper. There is a whole class of applications relating to wavelength conversion that aren’t possible in diamond for reasons that are fundamental and related to the nature of the diamond crystal,” he explained.

By leveraging tiny defects within the diamond’s crystal structure, the researchers were able to bypass previous limitations. This breakthrough opens the door to new uses for diamonds in quantum nanophotonics, a field that encompasses the interaction of light with tiny structures at the nanoscale.

Implications for Quantum Technology

The implications of this discovery are substantial. Sigurd Flågan, a postdoctoral scholar with the lab who led the experimental work, noted that diamonds can handle significant laser power without damage. “What we can do with our discovery now is, in principle, create an optical switch, laser, or modulator that can handle a lot more power than is currently achievable,” Flågan stated.

Potential applications include advancements in data centers, high-powered laser fabrication, and optical processing, which could lead to increased efficiency and performance in various technologies.

Research on this topic began several years ago, with the team first observing the relevant phenomenon at the end of 2023. Flågan indicated that it took time to develop their final intuition and model for what was happening, leading to their significant findings in early 2025.

Future Directions

The recent publication serves as a stepping stone for further exploration into the capabilities of diamonds in quantum applications. As the field of quantum nanophotonics evolves, the work being done at the University of Calgary may position the institution as a leader in harnessing the unique properties of diamonds.

In a wider context, the Alberta provincial government has recognized the importance of fostering innovation and research in technology. The government has allocated $55 million to develop a technology and science hub at the University of Calgary, emphasizing the growing significance of institutions engaged in cutting-edge research.

This research highlights the importance of collaborative efforts in advancing scientific knowledge and technology. With the potential to challenge existing perceptions of diamond’s capabilities, the University of Calgary’s Quantum Nanophotonics Lab is paving the way for future innovations that could transform various industries.