Generating ultra-violet lasers with near-infrared light through 'domino upconversion' of nanoparticles

Strong and coherent ultraviolet light emission devices have enormous medical and industrial application potential, but generating ultraviolet light emission in an effective way has been challenging. Recently, a collaborative research team co-led by researchers from City University of Hong Kong (CityU) developed a new approach to generate deep-ultraviolet lasing through a "domino upconversion" processing of nanoparticles using near-infrared light, which is commonly used in telecommunication devices. The findings provide a solution for constructing miniaturized high energy lasers for bio-detection and photonic devices.