, Volume 38, Issue 8, pp 1522-1527
Date: 24 Mar 2009

AFM Characterization of Raman Laser-Induced Damage on CdZnTe Crystal Surfaces

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Abstract

Raman laser studies of detector-grade CdZnTe crystals show an increase in intensity of the Te peaks of the Raman spectra even at very low laser powers. In this study, atomic force microscopy (AFM) was used to characterize the extent of damage to the CdZnTe crystal surface following exposure to the Raman laser. AFM images revealed localized surface damage in the areas exposed to the Raman laser beam. Additional studies using conductive-probe AFM techniques provided localized electrical information for the laser-induced Te-rich areas.