Deep-UV Aluminum Gallium Nitride Laser Enables Diverse Applications
ITHACA, N.Y., April 12, 2022 — Researchers at Cornell University demonstrated an optically pumped, aluminum gallium nitride (AlGaN)-based multimode laser that emits deep-ultraviolet (DUV) light at low modal linewidths and at wavelengths under 300 nm. DUV emitters have use in pathogen detection and sterilization, water purification, gas sensing, photolithography, and quantum computing and metrology. The realization of UV-C laser diodes based on AlGaN has been challenging, according to the Cornell team. Wide-bandgap