Mechanism of Nano-Cone Formation on Cd0.9Zn0.1Te Crystal by Laser Radiation

Optical Materials 2010
Artūrs Medvids, Aleksandrs Mičko, V Gnatyuk, S. Levytskyi, Yu Naseka

Self-organizing nanometer size structures are observed on the surface of Cd0.9Zn0.1Te crystal irradiated by strongly absorbed Nd:YAG laser irradiation at intensity in range of 4–12 MW/cm2. Thermogradient effect (TGE) has the main role in the interaction process of laser radiation with semiconductors. The surface morphology of the Cd0.9Zn0.1Te under the influence of Nd:YAG laser radiation has been studied. A change of surface relief has been defined by atom force microscope. The influence of laser radiation on the photoluminescence spectra has shown that at a threshold intensity of laser radiation is up to I = 4.0 MW/cm2 for formation of nano-cone structure on a surface of Cd0.9Zn0.1Te crystal. A graded band gap structure with optical window was formed at the top of nano-cones.

Keywords
Self-organizing nanostructure; Nd:YAG laser; Photoconductivity; Cd0.9Zn0.1Te crystal
DOI
10.1016/j.optmat.2010.03.006
Hyperlink
http://www.sciencedirect.com/science/article/pii/S0925346710001163

Medvids, A., Mičko, A., Gnatyuk, V., Levytskyi, S., Naseka, Y. Mechanism of Nano-Cone Formation on Cd0.9Zn0.1Te Crystal by Laser Radiation. Optical Materials, 2010, Vol.32, Iss.8, pp.836-839. ISSN 0925-3467. Available from: doi:10.1016/j.optmat.2010.03.006

Publication language
English (en)