Calgary Researchers Uncover Innovative Quantum Uses for Diamonds

Researchers at the University of Calgary have made a groundbreaking discovery regarding the properties of diamonds, unveiling new applications in the field of quantum nanophotonics. In a paper published in early December 2025, scientists from the university’s Quantum Nanophotonics Lab demonstrated a phenomenon known as second-harmonic generation. This process involves converting one color of light into another by altering the frequency and wavelength of a lightwave, a feat previously thought impossible with diamonds due to their highly symmetrical crystal structure.

Dr. Paul Barclay, professor in the Department of Physics and Astronomy and lead researcher at the lab, highlighted the significance of their findings. “Not only are we kind of breaking the rules by seeing these effects, but we’ve done so in a way where we can control how strongly we are breaking the rules,” he explained in an interview.

Unlocking New Potential in Quantum Technologies

The research team utilized minute defects within the diamond’s crystalline structure to overcome established limitations. This breakthrough suggests that diamonds can now be used in ways not previously considered viable for such a material. As postdoctoral scholar Sigurd Flågan, who led the experiments, noted, “Diamond is very good at handling a lot of laser power—you can have a lot of power coming in without breaking material.” This capability opens the door for creating optical switches, lasers, or modulators that can handle significantly more power than current technologies allow.

Potential applications for this discovery extend into various fields, including data centers, high-powered laser fabrication, and optical processing. Flågan emphasized the practical implications of their work, stating that the ability to manipulate light in new ways could revolutionize several industries.

A Journey of Discovery

While the publication in December marked a significant milestone, the research itself has been ongoing for several years. Flågan indicated that the team first observed the second-harmonic generation phenomenon in late 2023, with experiments continuing into 2024. It was not until early 2025 that they fully understood the underlying mechanisms at play.

The implications of this research are vast, potentially changing how scientists and engineers approach the use of diamonds in quantum technologies. As Alberta continues to invest in scientific advancements, including a recent allocation of $55 million to establish a tech and science hub at the University of Calgary, this discovery underscores the province’s commitment to fostering innovation in cutting-edge research.

The findings from the Quantum Nanophotonics Lab not only challenge traditional views of diamond materials in quantum applications but also pave the way for advancements that could enhance technological capabilities across multiple sectors.