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Mechanism of nanostructure formation on a surface of CdZnTe crystal by laser irradiation

Medvid' A., Mychko A., Gnatyuk V. A., Levytskyi S., Naseka Y.

Journal of Automation Mobile Robotics and Intelligent Systems

2009

Vol. 3, No. 4

127-129

Self-organizing nanometer size structures are observed on the surface of CdZnTe crystal irradiated by strongly absorbed Nd:YAG laser irradiation (LR) at intensity range of 4-12 MW/cm2. According to this model the Thermogradient effect has the main role in the interaction process of LR and semiconductors. The surface state of the CdZnTe under the influence of Nd:YAG laser irradiation has been studied. A state has been defined by atom force microscope. The influence of LR on the photoluminescence spectrahas show that at a threshold intensity of LR I=4 MW/cm2 creation of nanometer size structure begins. A graded band gap structure with optical window was formed at the top of nano-hills.