Cathodoluminescence Emission from Crystalline Linbo3

Cathodoluminescence (CL) emission from as-grown and indented LiNbO3 single crystals has been studied. The spectrum is strongly affected by deformation of the surface region. Three emission bands at about 410, 525 and 580nm have been observed. Irradiation with the electron microscope beam at very high current intensities causes a severe damage on the irradiated area. This effect can also be observed on the indented areas where the indentation pyramid can not be recognized after prolonged irradiation.