Surface investigations on HgBr2 single crystals by using confocal scanning laser microscopy
A confocal scanning laser microscope operating at 514 and 488 nm has been used to obtain two-dimensional (2-D) images of the mercuric bromide (HgBr2) crystal surface by photoluminescence, reflection, and transmission phenomena. Our measurements indicate that regions showing a strong photoluminescence may appear on the surface. By processing the 2-D images. we obtained the three-dimensional images, which offer a better possibility for the investigation. The analysis of spectral lines may be correlated with the presence of the Hg impurities.
Stanciu
GA
Department of Physics, University Politehnica of Bucharest, Romania. stanciu@physics.pub.ro
Polychroniadis
EK