Cathodoluminescence from high-pressure synthetic and chemical-vapor-deposited diamond

Analysis of the characteristics of an ultraviolet (UV) cathodoluminescence band reveals that the band exhibits a frequency peak at 4.6 electron volts of energy and dominant cathodoluminescence (CL) at low temperatures of 130 Kelvin. The UV cathodoluminesence occurs in boron-doped diamond prepared by chemical-vapor-deposition and in boron-doped high-pressure high-temperature synthetic diamond. The features are analyzed by spatially resolving the CL images with a scanning electron microscope.