University at Buffalo team predicts optical fingerprints for hexagonal boron nitride defects

Models simulate light responses from defects

The researchers used computer simulations to predict how specific atomic flaws alter light intensity and polarization when hit by a laser. They modeled ten different defects, including missing boron or nitrogen atoms as well as carbon replacements within the honeycomb structure. Some predicted defects would double or triple the frequency of incoming laser light depending on polarization direction. Even identical atoms arranged differently produced distinct light signals in one or two polarization directions according to the calculations.

Study aims to control quantum light sources

Vasili Perebeinos, a professor in electrical engineering at UB, stated that identifying defects helps determine which ones possess desired properties for technology. Paras N. Prasad, a SUNY Distinguished Professor and executive director of the Institute for Lasers, Photonics, and Biophotonics, noted these responses allow identification of atom arrangements. Olga Savkina led the study as a Ph.D. student while working with postdoctoral researchers on the project details.